Strangers attacked a senior on Thursday night in his home in Bremen.
According to the police, three perpetrators surprised the man in his sleep, handcuffed him and beat him.
The burglars had previously pried open a window in the family home.
After searching all the rooms, they fled with valuables and cash.
The perpetrators are said to have been masked and dressed in dark clothes.
The slightly injured man was able to free himself and alerted the police.
jpz / dpa