WARSAW, Feb 10 (Reuters) - Polish arms group Niewiadow-PGM GNSP.WA said on Tuesday it had signed a framework deal with U.S. defence supplier Northrop Grumman NOC.N on producing artillery ammunition in Poland.

The deal, also signed by Niewiadow units Elaboracja Niewiadow and Zaklady Sprzetu Precyzyjnego Niewiadow, sets out rules for cooperation on preparation, production, certification and introduction to market of 155-millimetre artillery ammunition, in particular for the European market, Niewiadow said.

The financial terms and production details were not disclosed. The 155 mm shell is widely used by Ukraine in its war with Russia, but has been in short supply.

"The first area of ​​cooperation is the joint production of a 155 mm artillery shell, which is currently at an advanced stage of preparation for the certification process," Niewiadow said in a press release.

"(The deal) creates a basis for both the development of production in Poland and joint market initiatives in the area of ​​offering ready-made solutions," Adam Januszko, Niewiadow's chief executive was quoted as saying in the statement.

(Reporting by Karol Badohal. Editing by Mark Potter)

((karl.badohal@thomsonreuters.com;))