China sent warships across the Taiwan Straits dividing line on Friday, Taiwan said, an unusual move signaling its largest drills in decades around the islands were continuing for a second day.

Several groups of warships had crossed the median line as of 11 a.m. Friday local time, the Taiwanese Defense Ministry said, in the first confirmation of such a incursion in recent years. The Peoples Liberation Army also sent warplanes across the US-defined boundary, the ministry said, the third straight of such flights day since US House speaker Nancy Pelosis arrival.