The attacks are said to have taken place in the northwestern parts of the African country.
"I have warned these terrorists that if they did not stop slaughtering Christians, they would pay dearly. They have done so tonight," he writes.
According to Africom, which is responsible for US military operations in Africa, the attacks were carried out at the request of Nigerian authorities.
The Nigerian Ministry of Foreign Affairs confirmed the attacks.
"Nigerian authorities remain engaged in structured collaboration with international partners, including the United States, in countering the threat of violent extremism," a statement said, according to AFP.
Trump has previously criticized Nigeria, claiming that Christians in the country are being subjected to threats and attacks that amount to “genocide.” Trump warned in connection with the allegations that military action could be taken against Nigeria.
The Nigerian government denies the allegations, and independent human rights organizations have disputed the claims. However, Christian right-wing groups in the United States and Europe have supported the accusations.
Trump further writes that more attacks against the terrorist group in the country are to be expected if "their slaughter of Christians continues."
