At least five Palestinians were killed and four others were wounded on Tuesday when Egyptian forces blew up two smuggling tunnels beneath the Egyptian-Gaza border, medical workers and residents said. The tunnels, which are used to bring goods from Egypt into the Hamas-controlled Gaza Strip, collapsed when Egyptian soldiers detonated explosives in an attempt to curb smuggling, residents said. Egyptian officials were not immediately available for comment. Israeli officials have said many of the tunnels are also used by militants to smuggle weapons into Gaza from Egypt.