Meanwhile the Marauder Sabretooth and X-Man Wolverine fight and Sabretooth follows Logan home to the X-Mansion. He destroys Cerebro, but is kept from hurting the other Morlocks when Psylocke engages Sabretooth in battle. Wolverine and the rest of the X-Men arrive and Sabretooth falls off a nearby cliff in order to escape the X-Men, pursued into the water by Wolverine. As the fight continues in the ocean, Psylocke is able to glean some information about the Marauders from Sabretooth’s mind, including information about Mr. Sinister.
From: The Uncanny X-Men #213 (1986)
See http://marvel.wikia.com/Mutant_Massacre for more!