Jomo Kenyatta was still imprisoned on charges that he led the
Mau Mau movement. The NPCP took up the call for the release of Kenyatta, following the lead by
Oginga Odinga. The colonial government continually harassed party members and attempted to crush the party by arresting several members on 6 March 1959, in what was the biggest round-up since the
Mau Mau emergency. Mboya's home was raided by police, in the middle of the night, looking for subversive literature. The future President of Tanzania,
Julius Nyerere was visiting Mboya at the time. Nothing was discovered by the police, but more than forty leaders and members of the NPCP were arrested and sent to their tribal homes. These included
Josef Mathenge the General Secretary and
Omolo Agar the Organising Secretary and Editor of the NPCP publication
Uhuru. The publication was also banned. The state of emergency regulations drafted for the
Mau Mau emergency were used to subjugate the party. Despite this persecution, the efforts of the NPCP youth and women's wings, ensured that the party continued to grow in popularity. == The NPCP Youth League and Women's wing ==