The country’s biggest nickel mining companies have voluntarily suspended their mining and exports operations in Surigao del Norte province after the government extended the enhanced community quarantine in Luzon to last until April 30.

According to separate disclosures on Wednesday, Nickel Asia Corp.’s operating arms Taganito Mining Corp. (TMC) and Hinatuan Mining Corp. (HMC) and Global Ferronickel Holdings Inc.’s Platinum Group Metals Corp. (PGMC) decided to suspended operations in their sites in the municipalities of Claver, Tagana-an and Cagdianao.