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LILONGWE, Malawi (AP) -- An official for Madonna's African charity says the star has arrived in Malawi to visit the girls school she is building in the impoverished country where she adopted two children.

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The official who could not be named because he was not authorized to speak on the matter said Madonna arrived Sunday at about 2:30 p.m. (1230 GMT; 830 EDT) on Ethiopian Airlines.

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The 51-year-old celebrity was accompanied by her four children — her daughters Lourdes and Mercy, and sons Rocco and David.

Madonna adopted the Malawian-born Mercy this year after she adopted David in 2008.

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The official said Madonna would take part in a groundbreaking ceremony for the girls school on Monday.

Madonna's Raising Malawi charity helps care for some of the country's 1 million orphans.

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Photos: Madonna in Malawi