Officers confiscated more than three dozen pipe bombs and several grenades from a Kalihi apartment and have submitted them for analysis, the Honolulu Police Department said Monday.

The items “appeared operational,” the department said by email.

The ordnance was found Sunday in a Kalihi apartment when family members were sorting through the deceased owner’s belongings. They called in the discovery shortly after noon.

SWAT’s Bomb Squad arrived around 2:30 p.m. and evacuated the building until about 7:30 p.m.

HPD said it receives two or three calls every month about possible explosive devices, often when people are cleaning out the home or garage of a family member. The department advises anyone who finds a suspicious device to leave the area immediately and call 911.