DUBAI, United Arab Emirates – The U.S. Treasury Department is adding economic sanctions to the travel bans already in place against 17 Saudis accused of taking part in the October slaying of writer Jamal Khashoggi inside their country’s consulate in Istanbul, Turkey.

The new sanctions freeze any assets the 17 may have in the U.S. and prohibit any Americans from doing business with them. The sanctions were announced Thursday. One of the men is a top aide to Saudi Crown Prince Mohamed bin Salman.

U.S. officials say they have pressed the Saudi government for a full investigation into the killing of Khashoggi. Turkish and Saudi authorities say the U.S.-based columnist for the Washington Post was killed by a team from the kingdom inside the consulate after he went there to get marriage documents.

Saudi authorities have 21 people in custody and the country’s top prosecutor said he would seek the death penalty for five of the suspects.