21.   Police said an investigation was underway into the cause of the fire.

22.   Government officials from the nearby city of Shuozhou rushed to the scene and an investigation is underway into the cause of the fire.

23.   Investigations were underway into what caused the rupture.

24.   Investigations are underway into the cause of the blaze which took firefighters nearly two hours to put out.

25.   Investigations were underway into the spectacular bomb attack, officials said, adding that police were probing possible security lapses that led to the killing.

26.   It added that an investigation was underway into malfunctioning and maintenance work was being carried out.

27.   A government investigation is underway into the cause of the landslide.

28.   A Xiamen Airlines official confirmed to AFP, on condition of anonymity, that an investigation was underway into the incident.

29.   An investigation is also underway into alleged illegal financing of the PR by anti-corruption magistrates Renaud van Ruymbeke and Mireille Filippini.

30.   An inquiry is still underway into the accusations.