Lagos, Nigeria (Jrobin08, Creative Commons)

Authorities said that in addition to passengers and crew aboard the plane, an unknown number of people might have also been killed or injured on the ground, according to MSNBC. Nigerian President Goodluck Jonathan has declared three days of official mourning for the victims.

The plane was heading from the capital city of Abuja to Lagos. Witnesses said the jet may have hit a power line before it crashed into a building and broke into two. Local reports suggest that at least three buildings were severely damaged, including a church.

Read more at MSNBC.com.

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