First Minister Carwyn Jones has described a suspected terror attack at Westminster as "a terrible attack at the heart of our democracy."
Four people were killed and dozens more were injured after a car and knife attack in London on Wednesday afternoon.
Welsh MPs have paid tribute to an unarmed police officer who was among four people killed in a suspected terror attack in Westminster yesterday afternoon.
PC Keith Palmer, 48, was stabbed by a man armed with two large knives inside the grounds of the Houses of Parliament.
A police presence remains at the rural Carmarthenshire home of terrorist Khalid Masood's mother on Friday evening.
Labour MP Chris Bryant described PC Palmer as 'our shield and defender yesterday.'
Rhondda MP Chris Bryant says security measures at the Palace of Westminster should be reviewed following yesterday's terror attack.