Turkey’s decision to block access to Twitter for about 12 hours from Wednesday afternoon to early Thursday as people scrambled to find loved ones after devastating earthquakes has compounded public frustration at the pace of relief efforts.

Opposition leaders and social media users criticised the throttling of the platform, which has helped people share information on arriving aid and the location of those still trapped in rubble after the initial tremor on Monday.

President Tayyip Erdogan’s government has blocked social media in the past and focused in recent months on fighting what it calls “disinformation”, which it said prompted the block on Wednesday.

It restored full access to Twitter early on Thursday as the quake’s death toll in Turkey and neighbouring Syria shot past 17,000.

Erdogan’s government “lost its mind and... the result is cries for help being heard less. We know everything you’re trying to hide”, main Opposition CHP leader Kemal Kilicdaroglu said after the block was imposed on Wednesday afternoon.

A government official who requested anonymity said the move had temporarily interrupted real calls for help, but that action was taken quickly and the service returned to normal.

“This had to be done because in some accounts there were untrue claims, slander, insults and posts with fraudulent purposes,” the official told Reuters, citing efforts to steal money under the pretense of collecting aid.

Turkish officials held talks with Twitter on Wednesday and said they expected cooperation in fighting disinformation during relief work, deputy transport minister Omer Fatih Sayan said.

Erdogan’s communications director, Fahrettin Altun, said Twitter cooperated in the meeting and pledged to support Turkey’s efforts, and officials look forward to working with it “over the next few days and weeks”.

“Disinformation is humanity’s common enemy and a grave threat to democracy, social peace, and national security,” he said on Twitter on Thursday.