China on Tuesday again called for more diplomatic efforts to resolve the Iran nuclear issue.

"We hope all the parties to further enhance diplomatic efforts on the Iran nuclear issue," Foreign Ministry spokeswoman Jiang Yu told a regular press conference.

Jiang said China had maintained close contact with all the relevant parties and hoped all the parties would take more pragmatic and positive measures to properly solve the issue.

China has always committed itself to safeguarding the international nuclear non-proliferation regime, the spokesman said.

The United States and its western allies have long accused Iran of secretly developing nuclear weapons under the guise of a civilian program, and currently they are discussing a United Nations resolution to impose sanctions.

Iran has denied the accusation and stressed its nuclear program was solely for peaceful purposes.