CHENNAI: Two EMU services between Moore Market Complex and Avadi and Tiruvallur have been cancelled because of block along the line. According to an official press release, line block/power lock is permitted at Annanur Station in Chennai Central-Arakkonam section for four hours from 11.38pm of January 2 to 3.38am of January 3 for engineering work in connection with erection of the new foot over bridge at Annanur station. Train no. 43257 MMC-Tiruvallur EMU leaving MMC at 11.45pm on January 2 and train no. 43001 MMC-Avadi EMU leaving MMC at 12.15am on January 3 are cancelled.Train no. 43801 Chennai Beach- Arakkonam EMU leaving Chennai Beach at 1.20am on January 3 will be diverted to run on down fast line between Villivakkam and Pattabiram Military Siding. Henceforth, it will not stop at Korattur, Patravakkam, Tirumullaivayil, Annanur, Avadi, Hindu College, and Pattabiram stations.