Nutter: No threats in Philadelphia, but city on high alert

Mayor Nutter , seen here at a news conference earlier this month, has faced union- and property tax-fueled headaches.

Following the bombings at the Boston Marathon, Mayor Nutter said Monday evening that there were "no specific threats or threat incidents in Philadelphia" but that the city is on high alert.

Flanked by top public-safety officials at a City Hall press conference, Nutter said the Broad Street Run on May 5 is expected to continue as planned "at this time." The city will evaluate what happened in Boston as details become available, he said. 

Nutter said there will be a "much more visible" security presence at the event, which has 40,000 participants signed up so far.

“In light of today’s events in Boston, let me assure you that we will step up our security efforts and response to the Boston Marathon,” Nutter said. “Runners and spectators will in fact see a much more visible security presence on race day for the Broad Street Run.”

The mayor said residents should alert law-enforcement agencies or the city if they see something suspicious. The Philadelphia police tip line is 215-686-8477. You can also call 9-1-1 or 3-1-1.

He cautioned against calling the Boston bombings a "terrorist" attack at this point because not enough details are known.