A passer-by who appeared to take photos with a 'selfie stick' in front of victims of the Westminster terror attack has sparked fury.

At least five people have died when a terrorist brought carnage to central London today, mowing down pedestrians on Westminster Bridge and attacking police with knives in the grounds of the Houses of Parliament.

It is currently believed one attacker was involved, killing four people, including a policeman, and leaving at least 40 pedestrians and two other police officers seriously injured.

PC Keith Palmer, 48, was tonight named as the murdered officer. He had 15 years service.

A man in sunglasses was seen with a selfie stick on Westminster Bridge this afternoon

Witnesses said the aftermath of the scene on Westminster Bridge was like a 'Hollywood disaster movie'.

People taking selfies at the scene of casualties lying on the ground - before they got help - caused revulsion.

A man in sunglasses was seen using a selfie stick to take pictures of the chaotic scene.

Referring to that, one observer said: 'Sir you with the selfie stick, you need that shoving up your a***.'

One person said: 'Unbelievable, how could someone think that it's acceptable to do that.'

At least 40 people were hit by a vehicle on Westminster bridge after 4x4 drove into pedestrians

Westminster bridge was strewn with injured people who were treated on the road or carried to the nearby St Thomas' Hospital

The terrorist crashed into people next to Parliament including pedestrians and a cyclist

A policeman points a gun at the terror suspect on the floor while emergency services attend him and a police officer outside the Palace of Westminster

Parveen Agnihotri‏ commented: 'Shame on the people taking selfies rather than helping the injured. Seems like we've become a nation of uncaring self promotion.'

Kavita Cooper‏ said: 'Touched by the bravery of those that ran towards victims to offer help and support. Disgusted by those taking selfies.'

Another added: 'Unbelievable! Some people disgusting! Please track this sick individual down & shame him publicly at the very least!'

One said: 'What is wrong with some people man. No brains at all. Muppet.'

There were disturbing scenes on Westminster Bridge where around a dozen pedestrians were mowed down

A police officer was stabbed by the knifeman (pictured at the top) before he was shot by other officers. One stabbed police officer was also treated (below)

Scotland Yard said the attack, which comes a year to the day after the terrorist atrocities in Brussels, is being treated 'as a terrorist incident until we know otherwise'.

At least 40 people were hit on Westminster bridge when a Hyundai 4x4 drove along the pavement, knocking down pedestrians before crashing into a fence below Big Ben.

One victim of the car attack was left floating face down in the Thames but was pulled from the river alive.

The terror suspect, an Asian man in his forties, then broke into the grounds of Parliament and stabbed a police officer before he was shot.

In the aftermath of the attack, the hundreds of people inside Parliament were warned to stay away from any windows before being evacuated.

Armed police from the Met's elite terror squad combed the estate to ensure it was secure keeping people in the 900-year-old Westminster Hall.

Prime Minister Theresa May was later seen being bundled into the back seat of her silver Jaguar surrounded by armed guards.

A counter-terrorism investigation is already under way, police said.