Two men disguised themselves in burkas to force their way into an elderly man's home before attacking him with a hammer and stealing a safe.
The intruders got into the family's home in Dorothy Road, Spinney Hills, Leicester, yesterday morning, Leicestershire Police said.
The victim, aged 77, was on his own at the time. He answered the door to the men and was pushed back inside, assaulted and tied up.
The men stole a safe containing cash, watches and personal belongings, and made off in a silver VW Transporter van.