A 26-year-old man has been arrested on suspicion of two serious sexual assaults in Scunthorpe.
The attacks are said to have happened in the area of Wells Street and West Street between 7.15am and 7.20am on Sunday, March 26.
In both cases the attacker fled after the women screamed.
The offender is described as white, in his mid-twenties, with blond hair. He wore light blue jeans and a pink or salmon top.
The man arrested in connection with the incidents remains in custody at this time.
Anyone with information should call Humberside Police on 101 quoting crime reference numbers 2259324 and 2259453.