7-foot snake missing in Swarthmore

Boa constrictor (not the missing one)

A week after an escaped pet python strangled two Canadian boys, Swarthmore police said this morning that a 7-foot boa constrictor could be on the loose in their borough.

Cops say a resident of the 300 block of Park Avenue reported the pet snake missing on Sunday afternoon, after it could not be found in the house or on the property.

"Anyone seeing the snake should IMMEDIATELY call 911 and advise police of its location," police said in a release.

Boas are nonpoisonous, but are extremely strong and can wrap their bodies around prey. Human fatalities are rare, but have occurred. This list from the Humane Society of the United States includes several boa attacks.