61.   The chairman has also given his approval for an investigation into the case.

62.   ...an investigation into a serious instance of corruption.

63.   The police have launched an investigation into the incident.

64.   He ordered an investigation into the affair.

65.   The United States and Israel clashed over demands for a U.N. investigation into the killings.

66.   There was a call today to reopen the investigation into the bombing.

67.   She would like an investigation into the assassination of her husband.

68.   ...an investigation into what the army described as a regrettable incident.

69.   The government has instigated an investigation into the cause of the accident.

70.   The police have launched an investigation into his activities.