Connacht (3) 6 Pens: Keatley (2)
Leinster (5) 18 Tries: Nacewa, D Ryan Con: Sexton Pens: Sexton (2)
Isa Nacewa got Leinster's first try against Connacht
Leinster's recent revival continued as they saw off Connacht in a low-key Magners League match in Galway.
Joe Schmidt's side, seeking a fourth consecutive win in all competitions, led 5-3 at half-time thanks to winger Isa Nacewa's 14th-minute try.
Connacht missed out on a losing bonus point as Frank Murphy's pass was intercepted by flanker Dominic Ryan for Leinster's second try in injury-time.
Ian Keatley kicked Connacht's points with two penalties.
Jonathan Sexton landed two for Leinster, plus a conversion.
The visitors used the set-piece to set up Nacewa's opening score.
Former Ulster scrum-half Isaac Boss charged through a gap at the back of a line-out near halfway, and looped a long pass out to the left for Nacewa to gather and score a well-executed try.
A ruck offence by Sean O'Brien allowed Keatley to claw back some territory and after a similar infringement from Cian Healy, he opened Connacht's account with a 34th minute penalty.
Keatley should have sent the hosts ahead but missed his penalty to the right of the posts.
Sexton slotted a 49th minute opportunity from a left-sided position to make it 8-3 but Keatley's second penalty restored the two-point gap.
Leinster fly-half Sexton replied in the 65th minute after good carries from Shane Horgan, replacement Gordon D'Arcy and man-of-the-match Richardt Strauss.
As Connacht pressed towards the end, Ryan snatched Murphy's pass on the Connacht's 10-metre line and sprinted clear for a sucker-punch score.
Connacht: Duffy, Fanning, Ta'auso, Matthews, Carr, Keatley, F. Murphy, Wilkinson, Cronin, Hagan, Swift, McCarthy, O'Connor, Ofisa, Muldoon.
Replacements: Nathan for Fanning (70), Nikora for Keatley (60), Upton for McCarthy (78), Taylor for O'Connor (70).
Not used: Flavin, Fa'amausili, Loughney, Willis.
Leinster: R. Kearney, Horgan, O'Malley, McFadden, Nacewa, J. Sexton, Boss, Healy, Strauss, Ross, Cullen, Toner, O'Brien, Jennings, Heaslip.
Replacements: D'Arcy for R. Kearney (40), Reddan for Boss (65), Shawe for Ross (65), Hines for Cullen (59), D. Ryan for Heaslip (70).
Not used: Harris-Wright, van der Merwe, Conway.
Ref: George Clancy (IRFU).