Four days after the April 2 bombing, another explosion caused damage to the Russian Embassy in Riga. As with the April 2 explosion, there were no injuries. The cause of the blast was plastic explosives detonated in a trash bin. The attack was linked with a rise in nationalist and extremist actions that seriously unsettled relations among Latvians, Jews and Russians. Alexander Udaltsev, Russia's ambassador to Latvia, joined Latvian leaders in blaming the incident on those trying to drive a wedge between Russians and Latvians. The Russian Foreign Ministry controversially blamed the bombing outside its Riga embassy on "anti-Russian hysteria recently produced in Latvia and the encouragement of nationalism and extremism" and called for drastic measures to punish those who were guilty.