Akpan had told the police that the students were kidnapped on the order of one Bright who accused the victims of betraying him after money was paid into the account of one of them.
The arrested suspect confessed that they killed and buried the three undergraduates in a shallow grave after raping the female among them, Joy Adoki.
Reacting in a statement signed by his spokesman, Garba Shehu, Buhari commiserated with the families of the students murdered by the kidnappers.
He also extends condolences to the university authorities and the Rivers State Government over the unfortunate incident.
The president described the tragic occurrence as “sad and heinous,” regretting that the “evil perpetrators have cut short the prospectively bright journey of these youths.”
He prayed that God will comfort all those who mourn these young students, and grant their souls eternal rest.
Buhari, while noting that the Nigerian Police Anti-Kidnapping Unit has apprehended one of the suspected perpetrators, further directed the Police Authorities to intensify search for the remaining suspects and bring them to justice.
The President further noted that his administration will continue to equip the law enforcement and security agencies to bring to an end the evil activities of kidnappers in the country.