WARSAW, Poland — U.K. company Babcock International, Sweden’s Saab and Italian Fincantieri have signed deals to boost cooperation with Polish state-run defense group PGZ.

The developments come as Poland’s Ministry of National Defence is accelerating efforts to select new submarines that will expand its capacities in the Baltic Sea’s shallow waters, a program all three companies have shown interest in.

The European players inked cooperation agreements with PGZ on the first day of this year’s MSPO defense industry show in Kielce, Poland, which runs Sept. 2-5.

Władysław Kosiniak-Kamysz, Poland’s deputy prime minister and defense minister, has said Warsaw plans to order between three and four new submarines for the naval forces by the end of 2025.

The planned procurement, which is to b

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