Service has been restored between the two cities, reports WPVI.
ORIGINAL STORY BELOW
Amtrak have announced:
Due to extensive damage to the overhead wires of the electrical system, Amtrak Acela Express, Northeast Regional and other services are not operating between Washington, D.C. and Philadelphia.
Confirmed: @AmtrakNEC is completely shut down DC to Philly; cld remain closed til tonight or even tomorrow morning. Hundreds stuck on trains
— Kevin Rector (@RectorSun) September 11, 2013
Through the company's statement, Amtrak have said that crews are working on the damage but there will be no service on the corridor between D.C. and Philly until further notice.
The Associated Press reports that the damage happened in Cecil County in Maryland, about 90 miles north of Washington D.C:
The cause of the damage remains a mystery.