LISBON (Reuters) - Portuguese authorities have informed Europol and Interpol of the theft of grenades and ammunition from a military arms depot, the defence ministry said on Friday.

The army said in a statement “offensive grenades and 9 mm ammunition” had been stolen in the robbery that took place on Thursday, without giving further details.

A spokesman at the defence ministry said international police authorities - Europol and Interpol - had been informed.

Daily Diario de Noticias reported four grenade launchers had been stolen along with 120 grenades, 1,500 bullets and 20 tear-gas grenades.