The Islamic State terror group said Thursday that it killed two Chinese teachers kidnapped last month in southwestern Pakistan. The two were working as language teachers in Quetta when armed men disguised in police uniforms abducted them on May 24. The ISIS-friendly Amaq news agency said members of the terrorist group killed the Chinese teachers after holding them in Baluchistan province, though no further details were provided. China’s foreign ministry said it was “deeply concerned” over the news and working to verify the report. The ministry also said authorities had “been trying to rescue the two kidnapped hostages over the past days.” Chinese officials have recently urged Pakistani authorities to boost security for foreigners, especially in Baluchistan, where China is in the midst of building a new port and has vowed to invest $57 billion in infrastructure projects.