A Kenyan rights group said on Thursday it had filed a court petition against plans to establish an Ebola quarantine centre for US nationals in the East African country.

Washington is building a “state-of-the-art” facility in Kenya for US citizens to quarantine after leaving the Democratic Republic of Congo, which is battling a major outbreak of the disease, a US administration official said.

Katiba Institute, a Kenyan rights group, said it had filed the petition seeking to halt operations at the facility and block the entry of people exposed to Ebola.

The rights group argued the centre was being established in secrecy and unilaterally, saying it “raises grave constitutional concerns”.

Jean Kaseya, head of the Africa Centres for Disease Control and Prevention (Africa CDC), warned the facility could place “additional pressure” on Kenya’s health system.