ISLAMABAD, Pakistan — Heavily armed gunmen attacked a luxury hotel in southwestern Pakistan on Saturday, in an assault in which a Pakistani separatist group claimed to be targeting Chinese interests and warned of further violence.

“After more than 10 hours of continuous battle and achieving all their targets the BLA fighters have used their last bullets on them and have left this world,” said a Twitter post by what claims to be the official account of the separatist group, the Baluchistan Liberation Army.

It added: “Expect more attacks China and Pakistan.”

[Update: Pakistan says 5 killed in luxury hotel attack.]

A Pakistani military official said that the gunmen had killed a security guard at the hotel entrance. The Chinese Embassy in Islamabad said that two other security agents had been wounded.