A massive factory fire that began after lithium batteries exploded has killed several workers in South Korea.The blaze broke out on Monday morning at the Aricell plant in Hwaseong city, about 45km (28 miles) south of the capital Seoul. Local television footage showed small explosions going off as firefighters sought to put out the fire. A part of the roof had collapsed.South Korea is a leading producer of lithium batteries, which are used in many items from electric vehicles to laptops.At least 16 people have died so far in the blaze, Reuters reported citing a fire official, though the…