A Lebanese man suspected in the death of a Filipina maid whose body was found stuffed in a freezer in Kuwait has been arrested, the Philippine foreign secretary said on Friday.

The discovery of the body of the maid, Joanna Demafelis, on Feb. 6 in an apartment in Kuwait City, where it had reportedly been kept for more than a year, spurred outrage and refocused attention on the plight of poor Filipinas toiling as maids abroad.

Alan Peter Cayetano, the foreign secretary, said he had told President Rodrigo Duterte about the arrest in Lebanon of Nader Essam Assaf, but added that Mr. Assaf’s Syrian wife, who is also a suspect in Ms. Demafelis’s death, remains at large. Mr. Assaf and his wife employed Ms. Demafelis as a maid in their home.