The committee monitoring U.N. sanctions against Libya says a son and daughter of former Libyan leader Moammar Gadhafi moved from Algeria to Oman in apparent violation of a U.N. travel ban.

Rwanda's U.N. Ambassador Eugene Richard Gasana, who chairs the sanctions committee, told the Security Council Tuesday that Algeria's U.N. Mission confirmed on June 5 that Mohammed Gadhafi and Aisha Gadhafi had relocated to Oman along with other family members.

Aisha Gadhafi, a lawyer in her mid-30s, and Mohammed Gadhafi, in his early 40s, have been subject to an asset freeze and travel ban since early 2011. Both fled to Algeria after Moammar Gadhafi was ousted later that year.

Gasana said the sanctions committee has directed its panel of experts to investigate their travel, which the U.N. did not authorize.