* Brent touches 4-month high before tensions ease
* Attack on U.S. forces in Iraq stokes fears of wider conflict
* 'All is well!' - Trump; action 'concluded' - Iran minister
* Reuters live blog - https://www.reuters.com/live-events/tensions-in-the-middle-east-id2917592 (Updates prices, adds comment)
LONDON, Jan 8 (Reuters) - Brent oil futures were up on Wednesday but well below peaks hit in frenzied early trading after a rocket attack by Iran on American forces in Iraq raised the spectre of a spiralling Middle East conflict and disruption to crude flows.
Prices gave up most of their early gains as analysts said market tensions could ease as long as oil production facilities remain unaffected by attacks.
Tweets by U.S. President Donald Trump and Iran's foreign minister also appeared to signal a period of calm - for now.
Brent crude futures were up 21 cents, or 0.31%, at $68.48 by around 1200 GMT, after earlier rising to their highest since mid-September at $71.75.
West Texas Intermediate crude futures were down 11 cents, or 0.18%, at $62.76 a barrel. They earlier hit $65.85, the highest since late April last year.
Iran's missile attack on U.S.-led forces in Iraq came early on Wednesday, hours after the funeral of Qassem Soleimani, the commander of the country's elite Quds Force killed in a U.S. drone stroke on Jan. 3.
Tehran fired more than a dozen ballistic missiles from Iranian territory against at least two Iraqi military bases hosting U.S.-led coalition personnel, the U.S. military said on Tuesday.
Stock, currency and gold markets were also roiled by the attacks.
Trump said in a tweet that an assessment of casualties and damage from the strikes was underway and that he would make a statement on Wednesday morning U.S. time. "All is well!" Trump said in the Twitter post.
Early indications suggested no U.S. casualties, one source told Reuters, although other officials declined to comment. Iranian state television said 80 "American terrorists" had been killed and U.S. helicopters and military equipment damaged.
Iraq, Germany, Denmark and Norway said none of their troops were killed or injured.
Executives and analysts said oil markets remained focused for now on the targets in the Wednesday attack being military, rather than oil industry facilities.
"Now the price move will depend on what the red line will be for Trump. After the initial reaction, gains have been taken back," Olivier Jakob of consultancy Petromatrix said.
"Headlines about Saudi's Bahri shipping, likely a temporary suspension, show that what is happening in the region is going to have some impact on oil flows. We're seeing this on freight rates now, so the risk on supply cannot be fully discounted."
Saudi Arabia's state tanker operator Bahri temporarily suspended transits through the Strait of Hormuz, the Wall Street Journal reported.
In a research note, Goldman Sachs maintained its three-month view for U.S. oil at $63 a barrel.
"The recent rally in oil prices is unsustainable without actual supply disruption," the bank said.
The Organization of the Petroleum Exporting Countries (OPEC) will respond to any possible oil shortages if necessary but it also has "limitations", the United Arab Emirates energy minister said on Wednesday.
Suhail al-Mazrouei said he sees no immediate risk of supplies through the important Strait of Hormuz being blocked.
In Wednesday's attack, Iranian news agency Mehr said Iran's Islamic Revolutionary Guard Corps had targeted the bases in Iraq that hosted U.S. forces. Tehran had vowed retaliation for the killing of military commander Soleimani.
"Iran took and concluded proportionate measures in self-defense," Iranian Foreign Minister Jawad Zarif said on Twitter. "We do not seek escalation or war, but will defend ourselves against any aggression."
(Additional reporting by Aaron Sheldrick and Yuka Oyabashi in Tokyo and Florence Tan in Singapore; Editing by Louise Heavens, Kirsten Donovan and Jan Harvey)