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                <p>MEXICO CITY – Legislators from all of Mexico's three major parties in congress are calling for a joint U.S.-Mexico working group to examine accusations that U.S. federal agents allowed hundreds of guns to flow into Mexico.</p>
                <p>Congressman Humberto Trevino estimated Tuesday that 150 shooting injuries or deaths have been linked to guns that were allowed to proceed into Mexico as part of a U.S. effort to build cases against traffickers.</p>
                <p>Two of those weapons were involved in the killing of a U.S. Customs and Border Protection agent in December in southeastern Arizona.</p>
                <p>Mexican drug cartels frequently pay straw purchasers to buy weapons at U.S. gun stores and smuggle them south to avoid stringent gun-control laws in Mexico.</p>
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            </p></div></div><p><strong>Read more:</strong> <a class="rssreadon" rel="external" title="Mexican legislators demand US talks on gun scandal   (AP)" href="http://us.rd.yahoo.com/dailynews/rss/world/*http%3A//news.yahoo.com/s/ap/20110309/ap_on_re_la_am_ca/lt_mexico_us_border_guns" target="_blank">http://us.rd.yahoo.com/dailynews/rss/world/*http%3A//news.yahoo.com/s/ap/20110309/ap_on_re_la_am_ca/lt_mexico_us_border_guns</a></p>