Yuri remained in Pskov until 1348 when Teutonic Knights organized a large attack against Lithuania (see Battle of Strėva). Pskov's army was helping Novgorod against Sweden when Livonian Order attacked a Pskovian fortress at Izborsk. Yuri died in the attack. Because Lithuanians were unable to defend Pskov, the city refused to accept another deputy from the Grand Duchy of Lithuania. Andrei responded with repressions: all merchants from Pskov were arrested and their goods confiscated. The friendly relationship between Pskov and Lithuania was terminated. Andrei remained as Prince of Polotsk for the next three decades.