UNITED NEWS INTERNATIONAL (UNI) — The deputy head of the British charity organization, Oxfam, resigned amid a growing sexual misconduct scandal.

The Times reported last week that senior Oxfam workers used prostitutes while delivering aid in Haiti following the devastating 2010 earthquake.

A different report by The Observer a day later claimed Oxfam staff in Chad had also used prostitutes in 2006 — a claim that led to the dismissal of a senior staff member.

Oxfam is further accused of covering up the results of an investigation into the Haiti allegations.

Deputy Chief Executive Penny Lawrence announced her resignation in a Feb. 12 statement.

She said she takes “full responsibility” for Oxfam staff behavior “that we failed to adequately act upon.”

According to the BBC, the International Development Secretary said Oxfam must now show “moral leadership” and be fully transparent about its internal investigations into the sex abuse claims or risk losing millions of pounds in government funding.