(VOVworld) - A man was arrested on Sunday as part of the ongoing investigation into the terror attack near the British parliament last week.

Security is tightened in London after the terrorist attack (Photo: AFP/ VNA)

London's Metropolitan Police said they detained a 30-year-old man in Birmingham on suspicion of preparing for terrorist acts. The arrest was made 4 days after the attack outside the British parliament complex which killed 4 people and injured 50.

Khalid Masood, 52, drove a car into pedestrians on London's Westminster Bridge, killing three people. A police officer was also fatally stabbed by Masood, who was later shot dead by police.