Suspected London bomber Yasin Hassan Omar has reportedly been arrested by police in a dawn raid on a house in Birmingham. The 24-year-old, who came to Britain from Somalia as a child, is alleged to have carried out the attempted attack on Warren Street underground station last week. He was detained after being shot with a stun gun. It is thought a rucksack he was carrying at the time was thrown out of the window by officers. Following army advice on the suspect package, around 100 nearby homes were evacuated and a controlled explosion was carried out. The suspect has been taken to London for questioning.Elsewhere in Birmingham, a further three men were arrested under anti-terrorism legislation. And two people were seized on a train heading to London from Newcastle. However a man who was arrested at Luton airport after reports he looked like one of the bombing suspects has been allowed to continue his journey. Police have searched two properties in north London and are continuing their examination of a flat, also in the north of the city, which has been linked to two of the four men suspected of carrying out the botched July 21 attacks. Chemicals thought to match those used in that attempt and bomb-making equipment have been found in a nearby garage. Residents say the two men returned to the flat after the bungled attack, and it is feared they collected explosives before disappearing.