ROME — Rome’s police chief says all embassies have been told today about a pair of package bombs that exploded at the Swiss and Chilean embassies, injuring two people who opened them.

Chief Francesco Tagliente said a suspicious package found at the Ukrainian embassy turned out to be a false alarm.

He spoke to reporters as he arrived today at the Chilean embassy, where witnesses say an explosion was heard shortly after 3 p.m. One person was injured.

Three hours earlier, a package bomb exploded inside an office in the Swiss Embassy, wounding the staffer who opened it. He was taken to the hospital with serious hand injuries but his life is not in danger, the Swiss ambassador Bernardino Regazzoni said.