* Magnitude 6.4 quake strikes near Tirana
* "Roof collapsed on our head" - survivor
* Second tremor to hit the region in two months
* Firefighters, army staff join rescue effort
* Residents trapped under rubble (Adds Bosnia quake, defence minister)
TIRANA/THUMANE, Nov 26 (Reuters) - At least nine people were killed when the most powerful earthquake to hit Albania in decades rocked the capital Tirana and surrounding region on Tuesday, causing buildings to collapse and burying residents under rubble.
Residents, some carrying babies, fled apartment buildings in Tirana after the 6.4 magnitude quake struck shortly before 4 a.m. (0300 GMT).
In the town of Thumane, Marjana Gjoka, 48, was sleeping in her apartment on the fourth floor of a five-storey building when the quake shattered the top floors.
"The roof collapsed on our head and I don't know how we escaped. God helped us," said Gjoka, whose three-year-old niece was among four people in the apartment when the quake struck.
The quake was centred 30 km (19 miles) west of Tirana, the U.S. Geological Survey (USGS) said, and was also felt across the Balkans and in the southern Italian region of Puglia.
Hours later a magnitude 5.4 earthquake hit Bosnia, with an epicentre 75 km (45 miles) south of Sarajevo, monitors said. There were no immediate reports of injuries.
Two women were found dead in the rubble of an apartment building in the northern Albanian town of Thumane and a man died in the town of Kurbin after jumping out of a building, a Defence Ministry spokeswoman said. Another body was recovered from rubble in Thumane.
Four bodies were pulled from two collapsed buildings in the western town of Durres, the Defence Ministry said, and a man died near the northern town of Lezhe.
Defence Minister Olta Xhacka said 135 people were injured.
Firefighters, police and civilians were removing the debris from collapsed buildings in Thumane. Most of the buildings that collapsed were built of bricks, a Reuters reporter said.
Rescuers in Thumane used a mechanical digger to claw at collapsed masonry and remove a tangle of metal and cables. Others groped with bare hands to clear rubble.
Two people were pulled from rubble in Thumane four hours after the quake, a Reuters reporter said. Doctors said they were in a bad condition.
"Everything at home kept falling down," Refik, a Tirana resident, said of the impact on his sixth-floor apartment.
"We were awake because of the previous quakes, but the last one shook us around," he told Reuters, referring to smaller tremors recorded in the hour before the main quake.
Emergency workers told local media one of those killed was an elderly woman who had saved her grandson by cradling him with her body.
The quake was the second powerful tremor to hit the region in two months.
Xhacka said the quake's epicentre was in Durres. It was followed by 100 aftershocks.
"Durres and Thumane are the areas worst hit. Rescue-and-save work continues in the collapsed buildings there," she said as troops pulled a victim from a hotel in Durres.
At least 135 people were injured, with 72 hospitalized, Xhacka said. Two planes from fellow NATO-member Romania were expected to land with specialized search and rescue equipment and help was coming from Italy and Turkey, Xhacka said.
"Firefighters and army staff are helping residents under the rubble", in Durres and Thumane, the Defence Ministry said.
An unidentified man, with a wound dressing on his right cheek, told News24 TV his daughter and niece were among those trapped in a collapsed apartment building in Durres.
"I talked with my daughter and niece on the phone. They said they are well and are waiting for the rescue. Could not talk to my wife. There are other families, but I could not talk to them," the man said.
Located along the Adriatic and Ionian Seas, between Greece and Macedonia, Albania experiences regular seismic activity.
An earthquake of 5.6 magnitude shook the country on Sept. 21, damaging around 500 houses and destroying some. The Defence Ministry had said it was the most powerful quake in Albania in the last 30 years.
The images of collapsed buildings in urban areas suggested Tuesday's quake was more powerful than one in 1979 which razed a neighbourhood of a northern town. Neither of those two earlier earthquakes caused fatalities.
The Balkan nation is the poorest country in Europe, with an average income of less than a third of the European Union average, according to Eurostat data. (Reporting by Benet Koleka in Tirana and Fatos Bytyci in Thumane; Writing by William Maclean; Editing by Janet Lawrence)