ROME, Sept 13 (Reuters) - A five-month-old baby boy drowned during a rescue operation off the Italian island of Lampedusa after a boat carrying migrants across the sea from North Africa capsized, ANSA and other Italian news agencies reported on Wednesday. The tragedy occurred as migrant landings on Lampedusa surged, leaving the small island struggling to cope. About 1,850 new arrivals landed on Wednesday, bringing the total number of migrants in Lampedusa to more than 6,700, ANSA said. Overall, about 123,860 boat migrants have arrived in Italy since the start of the year, the latest interior ministry datashowed. On current trends, arrivals are near the peak recorded in 2016, when about 181,500 sea migrants arrived in Italy.