Unidentified drones breached Ireland's airspace this week during a visit by Ukraine's President Volodymyr Zelenskyy, a source familiar with the matter told CBS News on Friday.

"Any incident like this would be well under control by defense forces," the source told CBS News, adding: "You see these across Europe now."

The Irish Department of Defense told CBS News in a statement Friday that "all of the circumstances regarding the incident" are being investigated and analyzed by Irish military and police officials.

The drones were large and likely of military specification, and the incident was classed as a hybrid attack by Irish officials, according to the Irish news outlet The Journal, which cited security services in the country. Senior Irish government officials were briefed following t

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