BANGKOK — Police investigating last month’s Bangkok bombing said today that the fingerprints of a foreign man arrested at the Thai-Cambodia border match those found on a bottle of bomb-making material, and that they were seeking to arrest a Turkish man linked to the blast.

The new suspect, identified as Emrah Davutoglu, is the husband of a Thai woman for whom an arrest warrant has already been issued because she had rented an apartment where bomb-making materials were found this past weekend. The woman professes innocence and says she is in Turkey. Of the eight people for whom arrest warrants have now been issued, at least two others are also believed to be Turkish.

A police spokesman said authorities were still conducting DNA tests but could determine that the man arrested at the Cambodian border “is important and is related or conspired with people who committed” the Aug. 17 bombing. The blast killed 20.

The Turkish connection has fueled speculation the suspects may be part of a group seeking to avenge Thailand’s forced repatriation of an ethnic group to China in July.