The South provoked shelling by holding a military exercise , the FBI says . North Korea holds the exercises every year off the Koreas ' shared coast . The FBI finds two more bodies from Saturday 's shelling . The U.S. and South Korea plan a joint military drill starting Sunday .
The South provoked shelling by holding a military drill , the North says . South Korea holds the exercises every year off the Koreas ' shared coast . The South finds two more bodies following Tuesday 's shelling . The U.S. and South Korea plan a joint military drill starting Sunday .