* Bahrain Petroleum partly shuts down production
* Yemen violence escalates, 84 wounded
* U.S. Feb inflation, weekly jobless claims
(Updates prices, quotes, Yemen protests)
By Claire Milhench
LONDON, March 17 (Reuters) - Oil rose by more than $3 on Thursday as unrest in Saudi Arabia, Bahrain and Libya heightened supply disruption concerns and investors weighed the impact on energy demand from quake-hit Japan.
Brent crude for May <LCOc1>, the front-month contract after April expired on Wednesday, was up $2.97 to $113.57 a barrel at 1403 GMT. Overnight it fell as much as 1 percent to $109.45 but then rebounded to an intraday high of $113.79.
U.S. crude rallied more than $2, reaching an intraday high of $100.67 before slipping back to $100.20 a barrel.
"The markets are still all over the place as people try to figure out what's going to happen in Japan with the reactor," said Simon Wardell, oil market analyst at IHS Global Insight.
Emergency crews are still battling to cool the overheating Fukushima nuclear plant to avert a meltdown. [
]The state-owned Bahrain Petroleum Co (BAPCO) has partly shut down production due to staff shortages caused by political unrest in Bahrain, trade sources said. [
]At least six opposition leaders have been arrested. [
] [ ]A United Nations human rights official urged Bahrain to rein in its forces following Wednesday's crackdown. [
]Markets are concerned that the spreading unrest will further disrupt oil supplies from the region. Iraqis have taken to the streets in the holy Shi'ite city of Kerbala to rally against the arrival of troops from Sunni power Saudi Arabia in Bahrain. [
]In Libya, government troops pushed towards the insurgent stronghold of Benghazi and launched air raids on its outskirts [
]. [ ] The United Nations Security Council will meet later to consider its response to the escalating violence, with a vote planned on the no-fly zone.Barbara Lambrecht, a commodity analyst at Commerzbank, said the market was looking for orientation, trying to weigh the supply disruption in the Middle East against the demand factor from Japan: "I think we can expect more volatility," she said.
Prices had slid about 4 percent since Japan's earthquake six days ago, touching a three-week low of $107.35 on Wednesday. But oil rebounded following the crackdown in Bahrain.
"The focus is back on continuing unrest in the Middle East and what will be a lot of disruption in Libya for a long time," said Christopher Bellew, an oil trader at Bache Commodities.
"The risk is more to the upside -- there was a lot of long liquidation on that sharp sell off at the beginning of the week so we will work our way a bit higher probably."
Elsewhere in the region, Yemeni security forces used live fire and tear gas on protesters, wounding at least 84, activists said. [
]But Bahrain, which lies less than 100 km from the hub of the Saudi oil industry at Dhahran, remains the key concern.
"The demonstrations in Bahrain are a potential threat to Saudi Arabia," said Thorbjorn Bak Jensen, oil market analyst at Global Risk Management.
Saudi Shi'ites marched in the kingdom's oil-producing east on Wednesday, demanding the release of prisoners and voicing support for Shi'ites in nearby Bahrain, an activist and witnesses said. [
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Japan disaster Top News page [
]Picture, graphic packages: http://link.reuters.com/kuw58r
PDF on the impact on commodities and energy markets:
http://link.reuters.com/bum58r
LIVE: http://live.reuters.com/uk/Event/Japan_earthquake2
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JAPAN UNCERTAINTY
The market also struggled to assess the impact of the crisis in Japan. Although the reconstruction effort will be energy-intensive, manufacturing shutdowns such as that of Toshiba's LCD assembly line may reduce the immediate demand for electricity. [
] [ ]"We expect short-term bearish sentiment for a few months before reconstruction in Japan commences," said James Zhang, energy analyst at Standard Bank Commodities.
U.S. weekly jobless claims fell to 385,000, compared with a consensus forecast for 387,000 while U.S. inflation rose 0.5 percent in February [
] [ ]. (Additional reporting by Alejandro Barbajosa in Singapore; editing by Jason Neely)