Nov 16 (Reuters) - Karelian Diamond Resources PLC KDR.L :
* CONFIDENTIALITY AGREEMENT WITH RIO TINTO HAS BEEN EXTENDED TO 2020
* LOSS AFTER TAXATION FOR FINANCIAL YEAR ENDED 31 MAY 2018 WAS EUR 439,568 (2017: EUR 410,814)
* NET ASSETS AS AT 31 MAY 2018 WERE EUR 9 MILLION (2017: EUR 9.5 MILLION)