DUBAI (Reuters) — Iran seized a United Arab Emirates-registered ship violating its territorial waters this week, Iran’s Foreign Ministry said on Thursday, adding that UAE coastguards killed two Iranian fishermen on the same day.

“On Monday, an Emirati ship was seized by Iran’s border guards and its crew were detained due to illegal traffic in our country’s waters”, state TV quoted the statement as saying. “On the same day, UAE guards shot dead two Iranian fishermen and seized a boat.”

Tensions have risen between the two countries which face each other across the Gulf since last week’s agreement between the UAE and Israel to normalise ties.