BOSASSO, Somalia, Feb 5 (Reuters) -- An explosion killed at least 20 people and wounded a hundred more on Tuesday in a northern Somali port where Somali and Ethiopian immigrants begin the dangerous crossing to Yemen, a regional official said.

"A big explosion killed more than 20 people and wounded at least a hundred tonight" Bari regional governor Musa Gelle Yusuf told Reuters. "More dead bodies are still being brought to Bosasso hospital. We do not know the cause but police are investigating."

(Editing by Jon Boyle)

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