An Israeli citizen was wounded in a knifing attack in London Wednesday night, which saw one American killed and two others injured, Sky News reported Thursday. Armed police were called at 10:33 p.m. (2133 GMT) after a man with a knife started to attack people in London's Russell Square, an elegant park near the site of a 2005 suicide bombing. 'Early indications suggest that mental health was a factor in this horrific attack,' said London Metropolitan Police Assistant Commissioner Mark Rowley.