A 79-year-old woman was left injured after two teenagers forced their way into her home and stole money being saved to buy a new television.
The victim suffered injuries to her wrists and to one hand during the robbery on Monday which detectives described as "a cowardly attack".
The raid happened at the pensioner's home in Cunningham Crescent, Kinson, Bournemouth, at about 1815 GMT.
The hooded robbers were male and aged between 15 and 18 years old.
Detectives have not released details of how much money was stolen but described it as a "significant" amount.
Det Sgt Alistair Rogers, of Dorset Police, said he believed the pair were local to the area as they knew the victim's name.
"This was a cowardly act that left the elderly victim very shaken," he said.
"The offenders entered and searched the victim's property while she was in it and demanded money from her.
"During the incident the victim was pushed which left her with bruising to both of her wrists and a cut to one of her fingers."
Witnesses are being urged to come forward.