1.   The corruption indictments come just three weeks after investigators discovered tunnels linking Nogales, Sonora, with Nogales, Ariz. Officials believe the tunnels were used for drug smuggling.

2.   Palestinians said Wednesday they discovered a tunnel Israelis were digging underneath the Temple Mount and police rushed forces to the old walled city to prevent rioting.

3.   Police discovered the tunnel after an anonymous tip.

4.   Authorities declined to say how they discovered the tunnel, and did not disclose who owns the property.

5.   Luis Manuel Cabrera, the prison director, said police discovered the tunnel, which led to an abandoned house, after an anonymous phone tip to guards.

6.   Several escape tunnels have been discovered in large prisons in Rio and Sao Paulo in recent weeks.

7.   The Drug Enforcement Administration announced it had discovered a tunnel under the U.S.-Mexico border that was used to smuggle drugs.

8.   The prisoners, whose tunnel was discovered, threatened to kill another six inmates but police moved in and quickly took control of the situation.

9.   The tunnel was discovered in the mountains east of San Diego, an area known as a busy corridor for illegal immigration and drug smuggling.

10.   U.S. and Mexican investigators discovered the tunnel last month.