Russia and Mali agreed to strengthen their cooperation over counterterrorism in a telephone call on Wednesday according to both parties, following the attack in Moscow that killed at least 137. Russian President Vladimir Putin spoke to the head of the Malian junta, Colonel Assimi Goita, and the President of Congo-Brazzaville, Denis Sassou Nguesso, the Kremlin said in a statement. Putin and Goita “agreed to strengthen anti-terrorist cooperation,” the Kremlin said. The Islamic State (IS) group has claimed responsibility on multiple occasions and published a graphic video of the gunmen carrying o…