SAN FRANCISCO -- A downtown city street block, closed for about an hour Monday morning, was reopened after officers determined a suspicious device found in a nearby apartment was harmless.

The 3100 block of 16th Street was shut down and the San Francisco Police Department bomb squad was called out just before 8:15 a.m after an employee at a front desk of an apartment complex reported a suspicious device that was found in an apartment, said Officer Gordon Shyy.

Bomb squad technicians later determined the device was not hazardous, Shyy said.

Police did not release further information about the device.

MUNI was rerouted and officers shut down the block to pedestrians and motorists but reopened the area at 9 a.m.

Contact Natalie Neysa Alund at nalund@bayareanewsgroup.com. Follow her at Twitter.com/nataliealund.