JAKARTA, Oct. 22 -- Indonesian police have named 11 companies as suspects in investigations into forest and land fires, including three foreign-invested firms, as authorities intensify enforcement against businesses linked to the blazes.

National Police Chief General Suyudi Ario Seto disclosed the figures on Wednesday, Antara reported, saying investigators had encountered no major obstacles but were not yet ready to identify the companies.

Suyudi said those held accountable could include not only the companies but also their owners and shareholders.

The investigations follow an earlier announcement by the police Criminal Investigation Agency that 98 reports involving corporations linked to forest fires had been upgraded to the formal i...