At least one person was killed in an attack on a five-star hotel in southwestern Pakistan, officials said.

An official told Reuters most guests had been evacuated from the hotel in Gwadar as of Saturday evening.

Gwadar is in the country’s poorest region, Balochistan, and has been targeted for heavy investment from China, according to BBC.

A separatist group called Balochistan Liberation Army claimed responsibility for the attack, news reports said.

The BLA has targeted Chinese workers in Pakistan multiple times, including during a brazen daylight attack on the Chinese consulate in Karachi that killed four people in November last year.

At the time, the BLA branded Beijing “an oppressor.”