Britain and Germany on Tuesday urged the international community to forge a "collective response" to the drone attacks on Saudi Arabia's oil installations, which US officials have blamed on Iran. British Prime Minister Boris Johnson and German Chancellor Angela Merkel discussed the attacks during a telephone call, agreeing on "the need to work together, alongside international partners, to agree a collective response," according to Downing Street.

The weekend strikes on Abqaiq - the world's largest processing plant - and the Khurais oilfield have knocked out 5.7 million barrels per day (bpd), or six percent of global production, sending prices soaring. Washington has blamed Tehran, and President Donald Trump has said that the United States is ready to help Saudi Arabia, but will wait for a "definitive" determination on who was responsible.

Johnson and Merkel stressed the "importance of avoiding the further escalation of tensions in the region". Merkel's spokesman Steffen Seibert said that beyond discussing the situation in the Gulf, the leaders spoke about Brexit.

They "agreed to continue the exchange on the sidelines of UN General Assembly next week," he said in a statement. The weekend attacks have spiked tensions and prompted concerns about an escalation.

Conflict in the Gulf region could put a large portion of global energy supplies at risk.

Copyright Agence France-Presse, 2019