A bus caught fire off highway 443 on Saturday night in what police are investigating as a possible arson, Judea and Samaria police said.
Police said no one was injured in the attack and no one was trapped on the Kavim bus, which was on the highway near a gas station near the entrance to Jerusalem.
Police said they suspected that the blaze was caused by a firebomb though fire services said there is reason to believe it was the result of a technical malfunction of the bus.
They added that the incident has caused serious gridlock on the highway between Modi’in and Jerusalem heading in the direction of the capital.
Police have opened an investigation into the incident.