By Arlette Saenz and Jeff Zeleny, CNN

(CNN) — Joe Biden will announce his presidential campaign on Thursday with an online video, sources familiar with the plans confirm to CNN.

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The former vice president’s team has been laying the campaign groundwork for months.

Biden will hold his first campaign event in Pittsburgh on Monday, a source said.

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The Delaware Democrat also is making plans to hit the road to the early voting states of Iowa, South Carolina and New Hampshire in the coming days, a person familiar with his campaign planning said.

This is a breaking news story that will be updated.

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