Police in New Hampshire are looking for a suspect who robbed a pharmacy while armed with what appeared to be a hand grenade.

Portsmouth police say a man wearing a fake mustache and sideburns entered a Rite Aide drug store Friday morning, held up a grenade and demanded drugs and cash. Police say the suspect, who appeared to be in his 40s, then fled the store with an undetermined amount of money and drugs.

Detective Lt. Corey MacDonald told the Portsmouth Herald that the grenade appeared to be real and that police will treat it as such until they know otherwise.