BBC television cameras were at the ground to record the game for Match of the Day . As the disaster unfolded, the events were relayed live to the Saturday sports show, Grandstand . In Ireland, RTÉ also showed the disaster unfolding, as it was covering the match live through its programme Sports Stadium . When the gates were opened, thousands of fans entered a narrow tunnel leading to the rear of the terrace into two overcrowded central pens (pens 3 and 4), creating pressure at the front. Hundreds of people were pressed against one another and the fencing by the weight of the crowd behind them. People entering were unaware of the problems at the fence; police or stewards usually stood at the entrance to the tunnel and, when the central pens reached capacity, directed fans to the side pens, but on this occasion, for reasons not fully explained, they did not.  A BBC TV news report conjectured that if police had positioned two police horses correctly, they would have acted as breakwaters directing many fans into side pens, but on this occasion, it was not done.