FILE PHOTO: Banners displaying the NATO logo are placed at the entrance of new NATO headquarters in Brussels, Belgium April 19, 2018. REUTERS/Yves Herman/File Photo
PARIS (Reuters) - NATO ambassadors will meet on Wednesday at the request of Poland on basis of the alliance's Article 4, two European diplomats told Reuters after an explosion in Poland close to the Ukrainian border reportedly caused by a stray Russian missile.
According to article 4 of the alliance's founding treaty, members can raise any issue of concern, especially related to the security of a member country.
One of the diplomats said the alliance would act cautiously and needed time to verify how exactly the incident happened.
(Reporting by John Irish, writing by Tassilo Hummel, editing by Leigh Thomas)
