POLICE will be carrying out armed patrols across West Yorkshire in the wake of yesterday's terror attack in London.

Armed officers will be patrolling high-profile locations across Bradford, such as the city's rail stations, shopping centres and the Valley Parade football ground as Bradford City prepare to face Rotherham.

The Prime Minister raised the UK threat level to critical after yesterday's attack on the Parsons Green underground station in London, meaning an attack is expected imminently.

Assistant Chief Constable Russ Foster, of West Yorkshire Police, said: “The increase in the threat level is a UK-wide status and we are not aware of any specific information relating to West Yorkshire.

“That said, this latest terrorist incident and the attacks we have seen in London and Manchester in recent months serve to remind us that an attack can occur at any time or place without warning and the public should remain alert but not alarmed.

“What members of the public in West Yorkshire will now see in response to yesterday’s incident in London is an increased presence of armed and unarmed police officers. This will be focused on transport hubs, crowded places such as shopping centres, iconic sites and high volume events, such as football matches.

“They are there to provide visible reassurance to the public but also to put us in a position where we can quickly offer an increased level of protection to people. We are being supported by armed police officers from the Civil Nuclear Constabulary, whose normal duties are being backfilled by the military.

“I would ask the public to continue to be vigilant and report any suspicious activity, behaviour or concerns to the police. Information can be passed to the confidential Anti-Terrorist Hotline on 0800 789321 or people should dial 999 in an emergency.

“We are committed to keeping the people of West Yorkshire safe and will continue to review the situation nationally and locally in regular liaison with our partner agencies to ensure we are doing everything we can around the clock to allow people to go about their daily lives as normal.”

Detectives investigating the Parsons Green bombing have arrested a teenager on suspicion of a terror offence, Scotland Yard have said.

Kent Police detained the 18-year-old man in the port area of Dover on Saturday morning.

The suspect will be moved to a south London police station, the Metropolitan Police said.

The Met said 45 witnesses have been spoken to and 77 images and videos have been sent to detectives by members of the public.

A renewed appeal for information was put out by the force, asking anyone with information to call the Anti-Terrorist Hotline on 0800 789 321 or 999 in an emergency.

An improvised device detonated on a packed District Line train at the underground station during the Friday morning rush hour, injuring 30.

NHS England said 19 victims were taken to hospital by ambulance, while 11 had presented themselves.

Three still remain in hospital care, the health service said.

A huge manhunt was launched for the potential network of terror plotters behind the attack as the country was braced for further attempts.

The country's top counter-terrorism officer suggested on Friday night that more than one suspect could have been involved in the attempt to slaughter commuters in a tube carriage.