ISTANBUL — Turkey has sent more troops, along with armored vehicles and tanks, to northern Iraq to support a longstanding mission to train Kurdish and Sunni Arab forces in the fight against the Islamic State, touching off an uproar in Baghdad, where officials called the move a violation of Iraqi sovereignty.

The troop movements on the outskirts of Mosul apparently came in recent days and were done in coordination with the autonomous Kurdish government in northern Iraq, but not with the central government in Baghdad. They prompted the Iraqi foreign ministry to summon the Turkish ambassador in protest on Saturday and demand that the forces withdraw from Iraq.

In a statement, the foreign ministry called the Turkish troop movements a hostile act and said they had been made “without the knowledge of the Iraqi central government,” adding, “This is considered a violation and a breach of the sovereignty of the country.” Prime Minister Haider al-Abadi and President Fuad Masum also voiced objections.