PHILADELPHIA - Emergency crews are on the scene after police say three SWAT officers were shot as a barricade situation unfolded in North Philadlphia Wednesday morning.Police say shots rang out while officers were serving a homicide arrest warrant on the 800 block of 10th Street.Three SWAT officers were reportedly shot and injured, and transported to a local hospital.MORE HEADLINES:SkyFOX was live over the emergency situation where police say a barricade situation unfolded following the shooting.Three people were handcuffed by police as FOX 29 arrived at scene.The circumstances surrounding the shooting are unclear at this time, and the condition of the officers is unknown.This is a developing story.