It's reported a train has derailed south of the US city of Philadelphia.

Some reports say two people have been killed and a number of others injured.

Amtrak's Train 89 was heading from New York City to Savannah in Georgia when it struck a mechanical digger that was on the track at Chester.

Some 341 passengers and seven crew members were on board.

All Amtrak services between New York and Philadelphia have been suspended.