NORTH PHILADELPHIA (WPVI) -- A fire that authorities call 'suspicious' kept crews busy in North Philadelphia.
It happened at a house on the 3000 block of North 5th Street around 3 a.m.
Firefighters arrived to find flames shooting from the upper floors of a three-story home.
The fire then spread to the porch of the home next door.
No injuries were reported.
'Suspicious' fire erupts in North Philadelphia