12 EU states ask Brussels to fund border walls
The officials from countries including Poland, Lithuania and Greece argued the move was needed as part of reforms aimed at countering efforts by neigbouring countries to weaponise migration.
Vilnius and Brussels accuse the regime of Belarusian strongman Alexander Lukashenko of sending across migrants from the Middle East and Africa in retaliation for EU sanctions.
"The EU needs to adapt the existing legal framework to the new realities, enabling us to adequately address attempts of instrumentalisation of illegal migration for political purposes and other hybrid threats," they wrote to the European Commission.
"This legitimate measure should be additionally and adequately funded from the EU budget as a matter of priority," it continued.
A spokesman for the European Commission said it had received the letter and would respond.