The war between Russia and Ukraine “is about to enter a new phase”, British intelligence officials said on Saturday. British Defense Intelligence said in an intelligence report that Russian forces are “definitely building up” in Southern Ukraine and that strategic fighting will now shift from the Donbas region in Eastern Ukraine to the area between Mykolaiv Oblast, Kherson and the Crimean Peninsula . South. “Russia’s war with Ukraine is about to enter a new phase, with the fiercest fighting shifting to a roughly 350-kilometer front line running southwest from near Zaporizhia to Kherson, alongside the Dnieper River,” the UK Ministry of Defence. “Russian forces are almost certainly massing in the south in anticipation of a Ukrainian counterattack or preparing for a possible attack,” the intelligence report added. US INTEL SAYS RUSSIA FABRICATED EVIDENCE IN UKRAINE PRISON STRIKE THAT KILLED 53 UKRAINIAN PRISONERS The UK Ministry of Defense also explained a significant movement of Russian troops, tanks and support vehicles to the southern region. “Large convoys of Russian military trucks, tanks, towed artillery and other weapons continue to leave Ukraine’s Donbas region and head southwest. Equipment was also reported to be moving from Russian-held Melitopol, Berdyansk, Mariupol and from mainland Russia via the Bridge Kerch in Crimea,” the intelligence briefing said. “Battalion tactical groups (BTGs), numbering between 800 and 1,000 troops, have been deployed in Crimea and will almost certainly be used to support Russian troops in the Kherson region,” the report added, noting that another BTG would likely join these forces. “in the next days.” RUSSIA LAUNCHES 60 SPOILERS ON SOUTHERN UKRAINE AS INCREASE AN OFFENSIVE AGAINST THE DNIPER RIVER After more than 160 days of fighting in a war that many experts believed would last less than two weeks, Ukraine has successfully launched counterattacks and regained territory on its eastern front once held by Russia. The country also found success targeting critical transportation infrastructure used by Russia to aid its frontline forces. “Ukrainian forces are targeting bridges, ammunition depots and rail links with increasing frequency in Ukraine’s southern regions, including the strategically important rail spur linking Kherson to Russian-held Crimea, almost certainly using a combination of blockade, damage, degradation . deny, destroy and disrupt results to try to affect Russia’s ability to resupply itself logistically,” the report said. CLICK HERE TO GET THE FOX NEWS APP A woman greets a Ukrainian serviceman on July 25, 2022, in Mykolaiv Oblast, Ukraine. (Ivan Chernichkin/Zaborona/Global Images Ukraine via Getty Images) The report comes as Ukrainian authorities moved and responded to a Russian offensive in Kherson last month.