South Korea’s intelligence chief is reported to have said that North Korea is very likely to attack again, a week after an artillery strike on a South Korean island. The revelation came hours after officials said Seoul was planning more military exercises with the US, BBC reports. On 23 November North Korea shelled the island of Yeonpyeong, killing at least four South Koreans. The disputed border area has been the scene of numerous clashes in the past. Won Sei-hoon, director of South Korea’s National Intelligence Service, told a parliamentary committee behind closed doors that the recent attacks came amid “internal complaints” about Pyongyang’s third generation succession and worsening economic situation, according to a ruling party official.