11.   Hundreds of young people were detained this month after clashing with the police in riots that authorities here blamed on satellite television broadcasts by Iranian exiles in Los Angeles.

12.   In Corpus Christi, authorities blame the Raza Unida prison gang for three of the nine murders since January.

13.   Municipal authorities blamed the delays on a computer glitch.

14.   No bombs were found, but the authorities blamed the Irish Republican Army for the threats.

15.   On Saturday, U.N. offices in Baghdad suffered a grenade attack, which Iraqi authorities blamed on Iranian secret service agents.

16.   Russian authorities blamed Chechen rebels for the bombings, although the Chechens deny involvement.

17.   Russian authorities widely blame Islamic guerrillas from the breakaway republic of Chechnya for supporting the bombing campaign in Russia.

18.   Russian authorities blamed it on Chechen rebels.

19.   Russian authorities blamed Chechen rebels for the abduction, but others pointed the finger at the Russian security service itself.

20.   Russian authorities blamed Chechen rebels.