All south-east Queensland trains have returned to usual service hours after an emergency incident at a station in Brisbane's south-west on Monday morning.

Springfield* and Ipswich rail services were initially suspended for more than an hour early in the morning before the residual backlog of trains clogged the entire network into the afternoon.

The police incident occurred at Chelmer station just after 7am and TransLink notified commuters it had suspended services between Indooroopilly and Sherwood stations just before 7.30am.

During the peak of delays, commuters faced up to an extra hour waiting and buses were brought in to replace trains in both directions between Corinda and Roma Street stations.