Thailand’s army chief admitted on Thursday that bullets used in last week’s assassination attempt on Sondhi Limthongkul came from a military arsenal.

The Thai activist who led a blockade of the kingdom’s main airports last year was shot and wounded on Friday in an assassination attempt.

Thailand, trying to recover from two years of political turmoil, braced for the return of ousted prime minister Thaksin Shinawatra from nearly 18 months in exile on Thursday,…