Two teenagers have been arrested and charged over an attempted phone heist on an Adelaide bus, where a teenage boy was allegedly stabbed.

SAPOL said that the two youths tried to steal a phone from a teenager before assaulting him.

It will be alleged that, at about 7.50pm on Wednesday, May 28, one of the teenage boys stabbed the victim in the shoulder with a knife at Woodville in Adelaide’s north.

Know the news with the 7NEWS app: Download today

Following an investigation, police arrested a 15-year-old boy from Athol Park and a 16-year-old from Elizabeth Downs the following day.

Both suspects have been charged with attempt of aggravated robbery, with the 15-year-old refused bail.

The 16-year-old was also charged with aggravated assault causing harm over the alleged stabbing and was given bail.

Both are due in court at a later date.