London [UK], July 30 (ANI): Two children were killed and nine others were injured in a knife attack targeting a Taylor Swift-themed dance class in northern England on Monday, CNN reported, citing local police. Merseyside Police said it received reports of a stabbing in Southport, north of Liverpool. Serena Kennedy, the Chief Constable of Merseyside Police, said six of the injured children are in critical condition, adding that the attack has also left two adults in critical condition. According to the police, the attacker walked into the premises armed with a knife and started attacking the ch…