Poland's Defence Minister Wladyslaw Kosiniak-Kamysz hailed the move as "a very strong political declaration showing how determined we are to defend our homeland."
"Finland is also considering such a decision, so I think that soon all the countries... in the northeastern region of NATO's flank will make a similar decision," Kosiniak-Kamysz told reporters.
The Latvian government on Tuesday officially launched the process of pulling out from the convention.
"This would be the first time when Latvia would step out of any international convention we've ever signed," Prime Minister Evika Silina said Tuesday after the cabinet meeting.
More than 160 countries and territories are signatories to the Ottawa Convention, including Ukraine but not the United States or Russia.