Some travel disruption is still expected until around 9pm, Network Rail said.
All lines have now reopened - there are residual delays of up to 30 minutes expected until at least 21:00 #Brockley— National Rail (@nationalrailenq) August 4, 2015
Southern Railway said:
Emergency services are dealing with an incident near Brockley which is causing disruption to services between London Bridge / Surrey Quays and Crystal Palace / Norwood Junction.
At London Bridge Station doors were earlier closed:
Network Rail earlier said they are on site with the British Transport Police and emergency services at Brockley.