North and South Korea have agreed in principle to reopen a joint industrial complex shuttered amid high military tension, Seoul said Sunday after wrapping up rare cross-border talks. Officials from both sides agreed to \"revive operations of the firms\" at the Kaesong industrial complex \"when ready,\" according to an agreement signed by both sides after marathon talks held near the border through Saturday and Sunday. The two sides will discuss ways to reopen the zone including a guarantee on preventing another shutdown in a meeting to be held on Wendesday at the complex just north of the border, it said.