LONDON (AFP) Pakistan fast bowler Mohammad Aamer has been warned about his future conduct by match referee Chris Broad after colliding with Australia captain Ricky Ponting in the ongoing first Test here at Lords. During the first days play here on Tuesday, Ponting was caught at short leg off 18-year-old left-arm quick Aamer for just 26. But as Aamer celebrated dismissing the star batsman, he crossed paths with Ponting and made contact with the Australia captain, who reacted angrily. It was the second time in as many matches Aamer that had run into a batsman after taking his wicket, having collided with Michael Clarke during the second of Pakistans back-to-back Twenty20 wins over Australia in Edgbaston last week. Clarke, though, patted an apologetic Aamer on the back. The umpires at Lords, Englands Ian Gould and South Africas Rudi Koertzen, did not feel any formal action under the International Cricket Council (ICC) code of conduct was required. However, an ICC statement issued on Wednesday said they did speak to Pakistan captain Shahid Afridi at the time of the incident. They also thought it appropriate for Broad to speak Aamer at the conclusion of Tuesdays play, in the company of Pakistan coach and fast bowling great Waqar Younis. Aamer is a young, exciting, talented player full of enthusiasm for this great sport and that is to be celebrated and nurtured, Broad said. But there are a few things he still has to learn in relation to how to conduct himself on the field of play, the former England batsman added. I told him that when he takes a wicket, he should celebrate with his team-mates rather than getting himself into the personal space of the outgoing batsman. Its a spirit of cricket issue. It has happened twice now so we as a playing control team thought it would be sensible for me to have a word with him, explained Broad, the father of England seamer Stuart. He (Aamer) accepted it graciously and undertook to avoid a repeat occurrence. As far as we are concerned the issue is now closed, Broad said. Aamer led Pakistans attack with four wickets for 62 runs as Australia were bowled out for 253 in their first innings here on Wednesday. Pakistan were 54 for two in reply when bad light stopped play shortly after lunch on the second day. This is the first of a two-Test series being played in England after an armed attack on Sri Lankas team bus in Lahore in March last year led to the suspension of international cricket in Pakistan.