Police believe two incidents on Sunday morning – in which men threatened to stab pensioners in Colchester – are linked.
The first attack happened around half eight at The Centre in Greenstead – a seventy six year old man was approached by two suspects who demanded his car keys and said they would knife him.
The victim refused and managed to drive away.
Five minutes later the pair tried again nearby at a garage on Veronica Walk – asking a seventy year old man for the time before jumping into the empty driver’s seat.
After issuing more threats, the men drove the car away – it was later recovered in Suffolk.
One of the suspects was described as white, of stocky build, aged in his 20s and about 5ft 8ins tall. He had short, light brown hair and wore a red Adidas jacket with white stripes down the arm.
The second was white, about 5ft 10ins to 6ft tall, and of slim to medium build. He was aged in his 20s and wore a grey jacket or hooded top.
Anyone with information should contact Colchester CID on 101 or Crimestoppers anonymously on 0800 555 111 or www.crimestoppers-uk.org.