NEW YORK (AP) - The U.N. Security Council is poised to adopt

another round of sanctions aimed at keeping Iran from developing

nuclear weapons.

U.S. Ambassador Susan Rice says the resolution before the

Security Council bans Iran from the commercial uranium business.

It would also prohibit the Iranian purchase of attack

helicopters and missiles and bar the production of missiles that

could carry nuclear weapons.

The measure, which would be the fourth round of sanctions aimed

at corralling Iran's nuclear ambitions, also includes financial

penalties for agents of Iran's revolutionary Guard.

It stops short of severe economic sanctions or an oil embargo.

Rice says the resolution will increase the pressure on Tehran.