A terror suspect arrested on Saturday night outside a takeaway in connection with the Parsons Green tube bomb has been released without charge.

Syrian student Yahyah Farroukh, 21, was arrested at the Aladdin's Fried Chicken in Hounslow, west London where he worked

Anti-terror detectives are still questioning five men and searching four properties. Five people, including a 17-year-old boy, continue to be questioned in connection with the Parsons Green terrorist attack.

The teenager was detained after officers raided what neighbours described as a 'halfway house' in Thornton Heath, south London, at around 12.05am on Thursday.

The investigation into the rush-hour bombing, which injured 30 people, has also seen three men aged 25, 30 and 48, detained in Newport, south Wales, and an 18-year-old man detained at the Port of Dover.

Scotland Yard said: 'A 21-year-old man arrested in connection with the investigation into the terrorist attack at Parson's Green Tube Station has been released from police custody with no further action.

'The man was arrested in Hounslow at 11.50pm on Saturday, 16 September.

'A warrant for his further detention had been granted by Westminster Magistrates' Court until today, Thursday, 21 September. He was subsequently released. 'A further five men remain in custody, under section 41 of the Terrorism Act in connection with the investigation.

Commander Dean Haydon, head of the Met Counter Terrorism Command, said: 'This continues to be a fast-moving investigation. A significant amount of activity has taken place since the attack on Friday.

'We have five males in custody and searches are continuing at four addresses. Detectives are carrying out extensive inquiries to determine the full facts behind the attack.

'We anticipate that the searches will take some days to complete and may cause further disruption. However, it is important that we continue with these searches and I'd like to thank all those affected for their support, patience and cooperation.'

Mahdi Ramadi, known as Bilal, was named locally as the first of three men detained yesterday in Newport, with witnesses saying he smiled when police moved in to arrest him.