North Korea fired a suspected intermediate-range ballistic missile toward the sea on Sunday, South Korea’s military said, two months after the North claimed to have tested engines for a new harder-to-detect missile capable of striking distant U.S. targets in the region.

The launch was the North’s first this year. Experts say North Korea could ramp up its provocative missile tests as a way to influence the results of South Korea’s parliamentary elections in April and the U.S. presidential election in November.