North Korea has launched two projectiles toward the sea, South Korea’s military said, hours after Pyongyang offered to resume nuclear diplomacy with the United States but warned its dealings with Washington may end without new proposals.

The launches on Tuesday and demand for new proposals were apparently aimed at pressuring Washington to make concessions when the North Korea-US talks restart. Pyongyang is widely believed to want the United States to provide security guarantees and extensive relief from US-led sanctions in return for limited denuclearisation steps.

The projectiles fired from the South Phyongan province, which surrounds Pyongyang, flew about 330km (205 miles), according to South Korea’s joint chiefs of staff and defence ministry.