Trains between Weymouth and Poole have been disrupted after a trespassing incident on the railway. 

All lines running between the stations were reported to be blocked after South West Railway (SWR) said there had been a trespass incident. 

Several services were cancelled and there were delays and alterations to many others. 

Trespassing on the railway is illegal.

When people trespass on the railway, Network Rail must make sure the railway is safe and check for damage before allowing trains to run again. 

Lines have now reopened but a spokesman for SWR said trains may still be cancelled, delayed or revised. 

To help supplement the train service, SWR are running between Weymouth and Poole

Disruption is expected to continue until 5pm.