In the early evening hours of 21 November, at least three bombs connected to timing devices were planted inside two separate public houses and outside a bank located in and around central Birmingham. It is unknown precisely when these bombs were planted; if official IRA protocol of preceding attacks upon non-military installations with a 30-minute advance warning to security services was followed, and subsequent eyewitness accounts are accurate, the bombs would have been planted at these locations after 19:30 and before 19:47.