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UPDATE 3-Hong Kong police to enter university as hunt for protesters turns up empty

Jessie Pang and Twinnie Siu

empty@ (Recasts first paragraph, adds police comments, adds context paragraph 6)

HONG KONG, Nov 27 (Reuters) - Hong Kong police said they would enter Polytechnic University on Thursday, bringing their near two-week siege of the campus to an end, after final searches for any pro-democracy protesters still hiding turned up empty.

For a second day on Wednesday security teams from the university scoured the maze of buildings at the campus, a focal point in recent weeks of the citywide protests that first erupted in June, but no one was found.

"As the school has completed the search, the police security team will enter Polytechnic University tomorrow, as we need to process dangerous items and collect evidence," District Commander Ho Yun-sing told reporters.

Any remaining protesters would be given medical treatment, he said.

The red-brick university on Kowloon peninsula was turned into a battleground in mid-November, when protesters barricaded themselves inside and clashed with riot police in a hail of petrol bombs, water cannon and tear gas. About 1,100 people were arrested last week, some while trying to escape.

Riot police sealed off the campus, setting up high plastic barricades and a fence on the perimeter.

The number of protesters has dwindled dramatically, with some managing to flee and others brought out. A lone woman found on Tuesday was "physically weak and emotionally unstable", according to a statement from the university.

The university on Wednesday asked government departments for help removing "dangerous materials" from the site, which is littered with rotting waste and detritus of the siege, urging authorities to take a "humane" approach.

The city's largest pro-establishment party, the Democratic Alliance for the Betterment and Progress of Hong Kong, urged authorities to send medics to the site to take any remaining protesters to hospital.

LULL IN CLASHES

The Polytechnic University campus was the last of five that protesters had occupied to use as bases from which to disrupt the city, blocking the nearby Cross-Harbour Tunnel linking Kowloon to Hong Kong Island and other arteries.

Demonstrators are angry at what they see as Beijing's meddling in the freedoms promised to the former British colony when it returned to Chinese rule in 1997.

China denies interfering and says it is committed to the "one country, two systems" formula put in place at that time.

The protesters had blocked the tunnel's mouth, smashed toll booths, lit fires and cemented bricks to the road, but it was reopened early on Wednesday, and Hong Kong television showed a steady flow of vehicles passing through.

Hong Kong authorities hope that a lull in clashes over the weekend during local elections, where pro-democracy candidates scored a landslide victory, can translate into more calm after nearly six months of turmoil.

Hundreds of people are facing potential jail time in connection with the unrest.

Secretary for Security John Lee said on Wednesday police had arrested more than 5,800 people since June, the numbers increasing exponentially in October and November, and had charged 923.

Smaller scale protests continued on Wednesday, as crowds in the central business district took to the streets around noon.

THANKSGIVING PROTEST

Reuters also reported that China's leaders had set up a crisis command centre in the Chinese tech hub of Shenzhen, just across the border from Hong Kong, to deal with protests that have become the biggest populist challenge since China's leader Xi Jinping came to power in 2012.

The Ministry of Foreign Affairs' Office in Hong Kong called the report "false", without elaborating, in a statement posted on its website Tuesday. "No matter how the situation in Hong Kong changes, the Chinese government's determination to safeguard national sovereignty, security, and development interests is unwavering," it said.

Despite the euphoria among protesters over the electoral victory, in which democracy advocates swept around 86 percent of the 452 district council seats, fresh demonstrations were planned for the weekend, including a march to protest against the use of tear gas on "children".

A "Thanksgiving" protest, in appreciation of the U.S Congress passing legislation supporting protesters, is scheduled for Thursday, the date of the U.S. holiday.

The city-wide elections drew a record turnout and were seen as a vote of no-confidence in Hong Kong's Beijing-backed leader, Carrie Lam, over her handling of the financial hub's worst crisis in decades.

One Hong Kong newspaper, Sing Pao, published a front-page spread for the second successive day calling for Lam's resignation. "Hong Kong people had enough, Carrie Lam quit," it read. (Reporting by Jessie Pang, Clare Jim, Noah Sin and James Pomfret; Writing by Anne Marie Roantree and Poppy McPherson; Editing by Paul Tait, Simon Cameron-Moore and Alex Richardson)