After three days break, on Monday Oil prices rose in early Asia trade but volumes were tiny as a number of markets remain on holiday for Easter.

U.S. crude’s front-month contract was up 50 cents at $39.96 a barrel at 0622 GMT. Last week, the contract rose 2 cents, finishing up for a sixth straight week. Brent’s front-month climbed 45 cents to $40.89 a barrel. Last week, it fell 76 cents, or nearly 2 percent, its first decline in five weeks. Oil prices have risen about 50 percent from multi-year lows hit in January on glut worries.

Declining U.S. oil output and strong gasoline demand were responsible for some of that recovery, but the bulk of it was powered by major producers’ plans to freeze output at January’s highs. Producers are due to meet on April 17 to discuss the plan.

Organization of the Petroleum Exporting Countries (OPEC member) Iraq’s oil exports have held steady so far in March, according to loading data and industry sources, halting for now the rapid supply growth from the country.

Baghdad has given verbal support to the initiative by OPEC and outside producers to freeze output to try to boost prices.

China’s refined fuel stocks at the end of February rose 17.3 percent from the previous month to their highest level in four years, while commercial crude oil stocks were up 1.1 percent, the official Xinhua News Agency reported on Monday.