Poland’s largest opposition party is leading a march meant to mobilize voters against the right-wing government, which it accuses of eroding democracy. Party leader Donald Tusk has called on Poles to march with him for the sake of the nation’s future. His party and security officials predicted that tens of thousands of people will join the demonstration on Sunday. It's being held on the 34th anniversary of the first democratic elections in 1989 after Poland emerged from decades of communist rule. Critics argue that a recently passed law that would allow a commission to investigate Russian influence in Poland will be used by the ruling party to remove Tusk and other opponents from public life.

India’s railways minister says the train derailment that killed more than 300 people and injured hundreds more was caused by an error in the electronic signaling system that led a train to wrongly change tracks. Ashwini Vaishnaw's explanation Sunday came as authorities worked to clear the mangled wreckage of two passenger trains that derailed Friday night in eastern India, in one of the country’s deadliest rail accidents in decades. The Press Trust of India news agency earlier reported that preliminary investigations revealed that a signal was given to the train to enter the main track line but was later taken off. The train entered another line, known as the loop line, and crashed into a goods train parked there.