US gives no date to reopen busy border crossing

ELLIOT SPAGAT - Associated Press
Border officials and emergency personnel look over the construction site where a scaffolding collapsed at the San Ysidro Port of Entry in San Diego Wednesday, Sept. 14, 2011.  Three people have been taken to hospitals after construction scaffolding collapsed on cars at the nation's busiest border crossing connecting San Diego and Tijuana, Mexico.   (AP Photo/Denis Poroy)
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Border officials and emergency personnel look over the construction site where a scaffolding collapsed at the San Ysidro Port of Entry in San Diego Wednesday, Sept. 14, 2011. Three people have been taken to hospitals after construction scaffolding collapsed on cars at the nation's busiest border crossing connecting San Diego and Tijuana, Mexico. (AP Photo/Denis Poroy)

SAN DIEGO (AP) — U.S. Customs and Border Protection says it has no estimate of when the nation's busiest border crossing will fully reopen after scaffolding collapsed on more than a dozen cars.

Crews are clearing debris Thursday as authorities try to determine what caused a construction platform to fall a day earlier in San Diego at the San Ysidro border crossing, across from Tijuana, Mexico.

CBP field operations director in San Diego, Chris Maston, says it has been more than 30 years since the crossing closed. He says traffic is "very manageable" Thursday even though 11 of 24 U.S.-bound vehicle lanes remained closed.