The office of Israeli Prime Minister Benjamin Netanyahu has acknowledged that Israel struck a radar installation near Tehran hours after the start of the ceasefire on Tuesday, but said that it refrained from further attacks after a call between Israel’s leader and US President Donald Trump.

The prime minister’s office acknowledged the strike in a statement after Trump publicly expressed frustration that Israel had launched strikes on Iran after the ceasefire agreement was reached but before it took effect.

An Iranian missile strike on Beersheba in Israel’s south killed four Israelis on Tuesday morning. Netanyahu’s office claimed this attack had been launched before the truce started and accused Iran of launching a single missile six minutes after the ceasefire went into effect.

Trump had little time for this accusation. “I’m really unhappy if Israel is going out this morning because of one rocket that didn’t land that was shot – perhaps by mistake – that didn’t land. I’m not happy with that,” he told reporters.

The Israeli air force retaliated bu destroying the radar installation near Tehran, it said.

Israel then refrained from carrying out other strikes on Iran after a conversation between Trump and Netanyahu, the Israeli prime minister’s office said, without specifying if the conversation had taken place before or after the attack on the radar station, according to Reuters.