Tokyo (CNN)North Korea may already have the capability to deliver missiles equipped with sarin nerve agent, Japanese Prime Minister Shinzo Abe said Thursday.

His warning came as analysts said North Korea may be preparing for a sixth nuclear test ahead of a key anniversary in the country and following the deployment of a US naval strike group to the region.
"The security situation around our country is getting increasingly severe," Abe said, who was addressing the Japanese parliament's diplomacy and defense committee.

sarin-tipped missile　 サリン弾頭ミサイル
capability　 能力
deliver　 （攻撃を）加える
ballistic missile equipped with chemical weaponsl　　　　　　　　　　　　　　　　　　　　 化学兵器を搭載した弾道ミサイル
nerve agent　 神経ガス