Sen. John McCain (R-Ariz.) will undergo treatment for brain cancer in the Washington area as he continues to attend to his duties in the Senate, his office announced Tuesday.

The senator from Arizona had been undergoing treatment in his home state. In the statement, his office said he received an MRI at the National Institutes of Health in Bethesda on Monday.

“Following the advice of his doctors, Senator McCain will continue to receive targeted radiation and chemotherapy treatments at NIH while maintaining a regular work schedule in the United States Senate,” the statement said.

McCain was diagnosed in the summer with glioblastoma, a serious form of brain cancer.

The statement provided no update on his condition.