Police are appealing for information following a "serious assault" at a party in the Longthornton area of Mitcham over the weekend.
Longthornton Police said: "Over the weekend in the Longthornton area of Mitcham, a party was gate-crashed by two to three, possibly mixed race, teenagers who seriously assaulted one of the partygoers."
The attackers were described as wearing balaclavas at the time of the assault.
If you were at this party and have any information about the assault, contact Merton CID on 020 8649 3037 or anonymously via Crimestoppers on 0800 555 111.
Serious Assault at a party last weekend in #Mitcham contact Merton CID 020 8649 3037 or anonymously @CrimestoppersUK 0800 555 111 with info pic.twitter.com/ffx5Kardjy
— Merton MPS (@MPSMerton) April 3, 2017
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