The discovery of a white powder in the wrong place has prompted a second emergency response in two days in Center City.
Today, the 18-story Municipal Services Building was evacuated after a powder spilled out of an envelope about 9 a.m., officials said.
The evacuation was later limited to the concourse of the tower at 1401 JFK Blvd. and the all-clear was sounded at 10:20 a.m. after it was determined the powder was harmless.
Deputy Fire Commissioner Ernest Hargett said the beige powder spilled out of an envelope in a room where workers open water-bill payments.
The envelope had been damaged and was in a sealed plastic Postal Service bag.