Russian President Vladimir Putin has attacked the "scum" responsible for a remote-controlled mine blast which has left at least 32 people dead, including 12 children, near Chechnya.

At least 20 people have been killed and another 100 injured in an explosion in the southern Russian town of Kaspiisk.

At least 10 people have been killed and another 80 injured in an explosion in the southern Russian town of Kaspiisk.