Police are looking for a man who is believed to behind two separate attacks against women.

The first incident took place on April 11 at around 6am, on the 149 bus in the Edmonton Green area.

A woman, 51, was on her way to work on the bus as she was approached from behind and punched in the side of the head – with the suspect getting off the bus after the attack.

Police say the victim did not suffer lasting injuries but was shaken by the incident and she feels anxious when using public transport.

The suspect is described as a black man, aged around 20 years old.

In an other incident on April 17 at around 6.15pm, an NHS doctor, 37, was returning from work at Shadwell DLR Station when she became aware of a man on the platform following her.

She boarded the train but got off at Canning Town to shake the man off, with the man still following her.

The victim asked two men she did not know to walk with her, but once they parted ways the victim called the police at around Butchers Road, Canning Town – as the suspect approached the woman and pushed her to the ground.

Police say she was taken to hospital with cuts, bruising and injuries to her mouth, including a broken tooth.

At the time of both attacks the suspect was wearing grey jogging bottoms, a grey hooded top under a dark jacket and a dark cap.

Detective Constable Alister Kim, from North East CID, said: “I am particularly keen to speak with the two men who kindly walked for a time with the victim when she was being followed by the suspect. They may, unknowingly have information that could assist my investigation and I urge them to get in touch.

“Having studied the evidence from both incidents I believe that both victims were attacked by the same suspect.

“There is nothing to suggest any motive or reason for the victims being targeted. Both women were simply going about their daily business.

“The random nature of both assaults makes it imperative that the man in the images is identified without delay. If you know who he is please contact police immediately.”