The United Nations on Tuesday launched a campaign urging mobile phone users in the U.S. to send text messages of peace to promote the International Day of Peace on Sept. 21.

The 160-character text message should start with the word "peace" and must be sent to 69866. The text messages will be gathered, posted in the website www.peaceday2008.org and delivered to world leaders attending the UN General Assembly on Sept. 23.

UN Secretary General Ban Ki-moon said the campaign will "send a powerful signal for peace that will be read, heard and felt around the world."