Greenpeace on Monday called on the German government to extend its ban on arms exports to Saudi Arabia.

Greenpeace activists turned in a petition of over 10,000 signatures to the Federal Ministry for Economic Affairs and Energy demanding an extension to the ban, which expires at the end of September.

Alexander Lurz, disarmament expert of Greenpeace Germany, said the government should maintain its ban on weapons exports to Saudi Arabia due to Riyadh’s role in the Yemen war.

“Since the war erupted in Yemen, 91,000 people have been killed,” he stressed.

Lurz also called on the government to stop arms sales to all countries involved in the conflict.

Impoverished Yemen has remained wracked by violence since 2014, when Shia Houthi rebels overran much of the country, including the capital Sanaa.

The conflict escalated in 2015 when Saudi Arabia and its Sunni-Arab allies launched a devastating air campaign aimed at rolling back Houthi gains.

Polls show that 81% of Germans oppose arms sales to nations involved in the Yemen war.

Last year, Chancellor Angela Merkel’s coalition government imposed restrictions on arms sales to Saudi Arabia due to its role in the conflict.

Berlin further sharpened its tone following the killing of journalist Jamal Khashoggi last October at the Saudi Consulate in Istanbul and halted all arms exports to the country.

In March, the government extended its ban until the end of September.