Mobile and phone lines are reported down, with night falling in the capital city.
[UPDATE I 6pm pacific standard time: Agence France Presse is reporting at this hour "hundreds" dead in Port-au-Prince. France is dispatching emergency relief. The U.N. mission headquarters in Haiti is reported destroyed, as are some foreign missions to the country. This is said to be the biggest earthquake experienced since at least 1964. - ed.]
[UPDATE II: 6:30 pst: BBC world television news is reporting via telephone with survivors in Haiti. One woman, identified as Michaella, says a market collapsed on many shoppers, including Americans, and "lots Americans." The reportedly destroyed U.N. mission is in the consular district of the city, and it is likely other foreign missions are too damaged. - ed.]