However, a Gold Fields spokesman said some were resisting the decision to return to work, prompting security concerns for those workers that are returning. The safety of employees is a priority, Gold Fields said in a message to staff, adding it had increased security at the site. Gold Fields' shares were flat at 07:11 GMT, after rising more than 5% on Wednesday following the news that the strike had been called off. While some workers were already back on site, Gold Fields and the NUM still need to sign a settlement agreement, the firm's spokesman said.