<br /> <p>A minute’s silence at was observed at the headquarters of the Metropolitan Police in London at 9.33 am on March 23, to honour the victims of the March 22 attack at Westminster.</p><p>Acting Met Police commissioner Craig Mackey spoke after the silence and paid tribute to PC Keith Palmer, who died in the attack.</p><p>At least four people, including a police officer and a suspect, were killed in Wednesday’s attack, the BBC</a> reported. The suspect was shot dead by police in Westminster.</p><br />
