Ireland's Kevin O'Brien reacts as he leaves the pitch at the end of play on day four of Ireland's inaugural test match against Pakistan at Malahide cricket club, in Dublin. Pic/AFP

Kevin O'Brien scored Ireland's first Test hundred when he reached three figures against Pakistan on the fourth day of their inaugural match at this level at Malahide on Monday. A two off left-arm quick Mohammad Amir saw O'Brien to his hundred in 186 balls, including 10 fours -- a shot greeted with cheers from a crowd of several hundred.