Sykes, Hagan and Berquist to join in the summer
Leinster have made a triple swoop ahead of next season after announcing the capture of Steven Sykes, Jamie Hagan and Matt Berquist.
Sharks second row Sykes and Connacht prop Hagan have both agreed a three-year deals, while Crusaders fly-half Berquist has signed an initial 12-month contract with the option for a further year.
Sykes, 26, has been capped by the Emerging Springboks, while Hagan returns to Leinster after two years at Connacht.
Berquist, 27, has spent the past two seasons as Dan Carter's understudy in Christchurch, having previously played for the Highlanders.
Leinster coach Joe Schmidt said: "We are pleased to secure Steven's signature, and this is a further welcome boost coming off the back of retaining some of our senior and up-and-coming players in recent weeks.
"Steven has gained a wealth of experience at Super 15 level in recent years and, at 26, we believe that his best years are still to come. He is an ambitious and talented player who is excited about joining the province.
"Jamie's desire to return to the province of his birth after an impressive spell with Connacht over the last few years is another important acquisition for the panel. Our coaching team have been impressed by the level of his performances again this year and we believe that he has the potential to improve even further.
"Matt has been understudy to Dan Carter at the Crusaders this year, which limits any player's game time a little, but he has proven quality and experience in the NPC and Super 15 and he will provide further competition for our established and up-and-coming out-halves.
"We are pleased to have secured all three players and I am sure that they will prove to be strong additions to the side over the coming seasons."