Tehran said Thursday it seized an Emirati boat following a Gulf incident in which two Iranian fishermen died, stoking tensions after the UAE said it would establish ties with Iran’s arch-enemy Israel.

The Iranian foreign ministry said it also summoned the UAE charge d’affaires to protest the maritime incident, which took place on Monday.

UAE coastguard vessels had “opened fire on several Iranian fishing boats… leading to the deaths of two fishermen”, a statement by the ministry said.