Three explosions went off near Cairo University, Wednesday, killing a senior police officer and injuring seven other people during clashes at the campus on Thursday..

A police general at the scene told AFP that two bombs were concealed in a tree between two small police posts, killing two.

A third explosion was reported about two hours later near where police and the press had gathered after the first bombs went off, resulting in a third death according to Reuters.

The interior ministry identified the slain officer as Brigadier General Tarek al-Mergawi.

Egyptian state television reported that police were clashing with supporters of ousted president Mohammed Morsi when the first bombs went off.

The first blasts also wounded at least four civilians and three senior police officers, including Maj. Gen. Abdel-Raouf El-Sirafy, who is the deputy chief of police in the Giza province, parts of which are located in the Greater Cairo area. Six more were injured in the third blast, according to reports.

Clashes between security forces and students have been a regular occurrence since Morsi was toppled in a military-backed coup.

Tensions have risen in recent days since Abdel Fattah el-Sissi, who led the coup, announced that he will be running for president in Egypt’s first elections since the coup.

Clashes erupted Tuesday between student supporters of Morsi and security forces in several cities, wounding at least 33 people, the health ministry said

At least 1,400 people have been killed in street clashes, mostly Islamist supporters of Morsi, since his ouster, according to rights group Amnesty International.