Dhaka, Nov. 8 -- A Paraguayan judge on Saturday ordered former President Santiago Peña held in pretrial detention at a military facility while prosecutors investigate his ties to digital lender ueno, whose collapse has left millions of customers struggling to access their accounts.

Judge Humberto Otazu ordered Peña, who has been charged with breach of trust and administration for personal gain, held at the facility, saying detention was necessary to ensure he remained in the country while the case proceeded.

The detention, a day after Peña's removal from office, deepens a political and financial crisis that has prompted protests in Asuncion, swept up senior officials and led regulators to try to contain risks to the wider...