A thief made of with half a gold chain after ripping it from around the neck of a 58-year-old woman on Saturday.
The victim had been walking with a friend along The Great West Road, in Hounslow, at 6.15pm, when the thief grabbed the necklace, breaking it, and then fled.
He was described as a thin black man, aged around 25, 5ft 11ins, wearing a navy top and jeans.
A 59-year-old man has been robbed of his wallet by a mugger who jumped out from behind a tree brandishing a knife.
The armed suspect struck at 5.55pm, on June 11, in Harvard Road, Chiswick.
He is described as a black man, aged around 18, 5ft 10 ins, with short dark hair, wearing a blue jacket.
A man was left with injuries to his face and chin after being violently attacked by three thieves on Hounslow Road.
The men struck near the junction with Issa Road, at 12.25am last Sunday. They punched and kicked him before making off with his rucksack, which contained clothes and a camera.
The first suspect was 5ft 8ins, wearing a grey hooded top and had a diamond stud in his right ear. The second was also Asian, 5ft 4ins and aged between 18 and 22. The third was black or Asian.
A female staff member at Curry's Superstore, in Hospital Road, was shocked when two Asian women leaned over her till and snatched £100.
The woman had opened the till to give them change at 3.30pm on Saturday when the two women, aged around 20 and around 40, grabbed the cash from the drawer.
Anyone with information about any of the crimes above should call Hounslow CID on 020 8247 6160 or Crimestoppers anonymously on 0800 555 111.