11.   He said medical advice could be sought on whether officers undergoing psychological counselling were fit to carry guns on duty.

12.   Last May, Hillard announced that officers would undergo training to better handle the first seconds of their encounters with the public, focusing on minorities.

13.   Last week, the army began replacing Mexico City police to allow the officers to undergo training in ethics, human rights, public relations and other areas.

14.   The Iztapalapa officers were told to report to Gustavo Madero, presumably while the Gustavo Madero officers underwent the training.

15.   The officer underwent surgery and was expected to survive.

16.   The officers will not undergo retraining in tactics and firearms use, Kerik said.

17.   The wounded officer underwent surgery early Wednesday and was listed in critical condition.

18.   The wounded officer underwent three operations at the Police Hospital in Lima and was in critical condition, according to a police statement.

19.   The officer underwent tests and treatment, but was not reportedly infected in the incident.

20.   Sri Lankan army officers are also undergoing military training in US academies.