The head of the Roman Catholic Church in England and Wales has warned against resorting to "ever more drastic measures in order to combat terrorism".
The Archbishop of Westminster, Cardinal Cormac Murphy-O'Connor, said people must never allow themselves to "surrender to a logic of fear" when faced with threats.
He was speaking at a special Mass for Brazilian Jean Charles de Menezes, who was shot dead by police in London as a suspected suicide bomber.
"In responding to the new threats in our midst, we must hold more firmly than ever to our laws, our freedoms and our principles. We must never allow ourselves to surrender to a logic of fear in which we have to resort to ever more drastic measures in order to combat terrorism."