The trouble-prone MTR saw problems again this morning with severe delays on the Kwun Tong Line, leading to some passengers having to wait five minutes just to get into the stations along the line. The delay, apparently due to a signal failure at the Yau Ma Tei station, started around 8.15am. It affecting most stations along the Kwun Tong line, including Choi Hung, Diamond Hill, Wong Tai Sin and Kowloon Tong. Long queues of commuters crowded platforms along the line. Some passengers complained about delays at almost every station while others complained about having to wait to enter some of the stations. The service returned to normal around 9.30am. An MTR spokeswoman said the delays were caused by signal failure at Yau Ma Tei station and passengers were only able to get on and off the trains at platform No. 4 at the station. This led to congestion between Mong Kok and Yau Ma Tei stations. She said some stations along the Kwun Tong Line took measures to control the passenger flow, by blocking commuters from getting to the turnstiles, to prevent stations from being overcrowded. The spokeswoman said although the congestion eased about 9am, the problem at Yau Ma Tei station was not fixed until 10.20am. Separately, minor delays occurred on the East Rail Line around 7.25am, apparently due to a signal failure at Hung Hom station. Normal services resumed about 7.50am.