Oil prices clawed back heavy losses on Wednesday, amid tight supply and growing prospects of new Western sanctions against Russia even as signs of progress emerged from peace talks between Moscow and Kyiv.

Brent crude futures gained 2.4% to trade at $112.89, reversing a 2% loss in the previous session.

U.S. West Texas Intermediate (WTI) crude futures gained $2.55, or 2.4%, to trade at $106.79, erasing a 1.6% drop on Tuesday.

“The volatile prices indicate extremely sensitive sentiment among investors,” said analysts from Haitong Futures. “People urgently need to see changes to make the market situation clearer.”

The focus turned to tight supply after the American Petroleum Institute industry group reported crude stocks fell by 3 million barrels in the week ended March 25, according to market sources.

That was triple the decline that 10 analysts polled by Reuters had expected on average.

The market saw a sharp sell-off in the previous session after Russia promised to scale down military operations around Kyiv but reports of attacks continued.

Commonwealth Bank analyst Tobin Gorey said in a note that “The (price) recovery suggests the oil market, at least, has a strong degree of scepticism about any ‘progress’.”

Meanwhile, the United States and its allies plan new sanctions on more sectors of Russia’s economy that are critical to sustaining its invasion of Ukraine, including military supply chains.

Keeping the market tight, major oil producers are unlikely to boost output above their agreed 400,000 barrels per day when the Organization of the Petroleum Exporting Countries and allies including Russia, together called OPEC+, meet on Thursday, several sources close to the group said.

Saudi Arabia and the United Arab Emirates, key members of OPEC+, said the group would not look to take action against Russia for its invasion of Ukraine, saying the group’s aim was only to stabilise the market and not to engage in politics.

However, oil prices face pressure of weakening demand from China owing to tightened mobility restrictions and lockdowns in multiple cities. The country’s financial hub of Shanghai extended its shutdown earlier than scheduled after recording nearly 6,000 new local cases.

“Gasoline and diesel wholesalers in eastern China see stocks piling up with very little demand from consumers, and operational rates at state-owned refiners are dropping significantly,” said a China-based oil trader.