Israeli Strategic Affairs Minister Ron Dermer “lashed out” at US captive envoy Adam Boehler during a phone call on Tuesday over his direct meeting with a Hamas delegation, a Western official told the Times of Israel.

Dermer was particularly furious at Boehler for discussing the number of Palestinian prisoners to be released in exchange for five American hostages without Israeli Prime Minister Benjamin Netanyahu’s consent.

The news of the meeting between the US and Hamas was leaked hours after the tense phone call, with the US believing Israel to be behind it, according to the Western official.