A man was attacked with a knife and a hammer after opening his door to three men in Berkshire.
The victim, aged in his 30s, was at home in Burlingham Close, Reading, when he heard banging at his door in the early hours on Tuesday.
He opened the door to find the men in dark clothing with their faces covered.
They attacked him with the knife and hammer when he tried to shut the door. He suffered minor cuts and bruises. Police appealed for witnesses.
Det Con Sue Beacham said: "We'd like to reassure people that incidents of this nature are rare.
"We are carrying out a number of inquiries to find those responsible and establish the motive for the assault.
"We urge anyone who witnessed the incident or saw anyone acting suspiciously to contact us as soon as possible."