Can you identify them? Police release pictures of suspects they want to trace.
They have released these CCTV clips of people they want to speak to in a bid to encourage people to come forward.
Northumbria Police said they want to speak to the young man and girl in the first two pictures after a violent assault and phone theft on the Metro in North Shields, North Tyneside.
At around 9pm on Saturday, April 6, a 22-year-old woman was approached by a girl while travelling on a Metro train.
The girl punched her in the face before kicking and biting her, and then took her phone.
The attack happened just before the Metro got into North Shields station, travelling along the coast from Whitley Bay.
Inquiries into the incident are ongoing, and officers have released these images of a male and female they want to speak to about the incident.
The pair were on the Metro at the time, and police think they may have information that could help with their investigation.
In a separate incident, police have also released this image of a woman they would like to speak to after a theft from a cash point in Sunderland.
At 7.40pm on Tuesday, November 6 last year, a man used a cash point at the Asda at Leechmere in Sunderland.
He took out PS100 but them absent-mindedly walked away from the machine before the cash was dispensed, leaving the notes hanging from the dispenser.
This woman, caught on CCTV, was in the area of the cash point at the time.
Officers are keen to identify and speak to her as she too might have important information.
Anyone who recognises the woman is asked to contact PC Hewitt (3770) in Sunderland.
If you have information about any of the people in the photos, or about the incidents in question, contact officers on the non-emergency number 101, or call Crimestoppers anonymously on 0800 555 111.
INVESTIGATIONS Above and right, the pair police need to speak to about a Metro assault, and top right, a woman who may have information about a supermarket theft