OSLO, Norway (AP) _ At least 1,000 people were being evacuated from the center of a Norwegian town today due to fears that a burning freight train might explode.

Two freight trains collided and burst into flames during the night at a train station in Lillestroem, 10 miles north of Oslo. No one was injured in the 1 a.m. crash.

However, one of the burning trains carried 104 tons of explosive propane gas, and police ordered a 700 yard area around the station evacuated. Police sounded the local alert sirens and broadcast orders to flee the downtown area.

``The situation is dangerous inside that area,'' police Chief Joergen Hoeydal said. He estimated that 1,000 to 2,000 people were to be evacuated.

The accident also stopped train traffic along the line, including express trains serving the national airport north of the capital.