The Russian President earlier this week told US President Donald Trump that he would retaliate, with the Kremlin sharing it would choose 'how and when' to respond.

The attack came hours after Trump spoke with Putin. According to Trump, Putin 'very strongly' said Russia will retaliate for Ukraine's weekend drone attacks.

Capital Kyiv among targets as aerial barrage kills at least four, wounds dozens.

The Russian President earlier this week told US President Donald Trump that he would retaliate, with the Kremlin sharing it would choose 'how and when' to respond.

Four people killed and 20 wounded as missiles and drones strike Ukrainian capital

Putin’s response to Ukraine’s massive attack on Russian airfields ‘probably not going to be pretty’, says Trump

More than 40 explosions were heard as Kremlin forces unleashed 48 kamikaze drones plus six aerial bombs and missiles on Kharkiv just before dawn today.

Diplomat predicts ‘huge, vicious and unrelenting’ assault, though a Russia expert thinks Moscow is unable to escalate much beyond current level of attacks. What we know on day…