Ukraine and Russia attacked targets on each other's territory on Thursday after brief direct talks between the two sides failed to make any progress on steps to end nearly three-and-a-half years of war.

Fox News senior strategic analyst Gen. Jack Keane explains why Russia seems to have no interest in a ceasefire with Ukraine on 'Fox & Friends.'

Negotiators for the warring sides in Istanbul appeared to make little progress on ceasefire terms or a possible summit between their presidents – with their meeting ending after less than an hour.

The warring sides remain far apart after the third round of U.S.-brokered peace negotiations on Wednesday. But there was progress on humanitarian issues.

Russia and Ukraine discussed further prisoner swaps on Wednesday at a brief session of peace talks in Istanbul, but the sides remained far apart on ceasefire terms and a possible meeting of their leaders.

Deaths have been reported on either side of the border, just hours after a third round of ceasefire talks took place in Turkey.

Russia has advanced around Pokrovsk for many months, but has so far failed to entirely encircle or seize control of the city.

Russian and Ukrainian negotiators met in Istanbul on Wednesday for their first peace talks in more than seven weeks, with Moscow under pressure from U.S. President Donald Trump to strike a deal or face tough new sanctions.

Russia and Ukraine are expected to hold another round of negotiations on Wednesday in Istanbul, but the two warring countries have flatly rejected each other’s demands.

Vasily Astrov, expert on the Russian economy at the Vienna Institute for International Economic Studies, told Newsweek that "inflation has really subsided markedly over the past few months. The outcome of this policy has been a marked cooling of domestic demand, with the welcome side effect of rapid disinflation.

A third round of direct talks in Turkey ended without progress toward ending the war.

Western defense companies are increasingly establishing new presences in Ukraine and working directly with Ukrainian companies.