London:Manchester United stayed in pursuit of Arsenal with a 3-1 win against West Bromwich Albion. Jason Koumas was given all the time and space in the world to unleash a low right-foot shot past Fabien Barthez. But the lead lasted less than a minute as David Beckham's cross-caught the Albion defence napping and Ruud van Nistelrooy stole in to poke home one of the easiest goals of his career. United went ahead in the 22nd minute after Roy Keane's low cross allowed Paul Scholes to elude his markers with ease and side-foot a simple low shot past Russell Hoult. Gary Neville's 55th-minute cross from the right eluded everyone in the Albion box until it fell to Ole Gunnar Solskjaer who took a swing and sent the ball crashing into the top corner of Hoult's net, to give United a clear 3-1 lead. Arsenal v/s Birmingham City The clash between Premiership leaders Arsenal and Birmingham City on Sunday was delayed by half-an-hour due to floodlight failure. But Arsenal drubbed Birmingham 4-0, in a fairly one-sided match. After just six minutes the Birmingham's defence was ripped open as Thierry Henry coolly tucked away his 19th goal of the season. Michael Johnson and Sylvain Wiltord tussled for the ball and it broke to Pires who hammered a superb volley past Vaesen from the edge of the area. Lauren put the result beyond doubt in the 67th minute, heading home a Bergkamp cross with the help of a deflection off Michael Johnson, taking the lead to 3-0. Henry finished off the scoring with his 100th goal for the Gunners in the 69th minute, ending a brilliant Arsenal build-up involving Bergkamp and Sylvain Wiltord. Arsenal now leads Manchester United by five points.