June 4 (Reuters) - Indian shares opened lower on Thursday, mirroring broader Asian markets, as renewed U.S.-Iran fighting rattled investors globally, even as conflicting signs of a de-escalation kept them cautious.

The benchmark Nifty 50 was down 0.53% at 23,282.45, while the BSE Sensex lost 0.55% to 73,935.83, as of 9:15 a.m. IST.

All 16 major sectors logged losses. The broader small-caps and mid-caps fell 0.3% and 0.2%, respectively.

Israel and Lebanon agreed to implement a ceasefire to end hostilities, the Trump administration said on Wednesday, boosting hopes for a broader deal to end the Iran conflict.

Tehran, which had conditioned any deal with the U.S. in part on an end to fighting between Israel and Lebanon, earlier struck Kuwait, damaging its airport and injuring dozens, while the U.S. military carried out strikes near the Strait of Hormuz.

Other Asian markets fell 1.4%. Brent crude futures dropped marginally after the Israel-Lebanon ceasefire, but remained elevated around $97 a barrel. [MKTS/GLOB]

(Reporting by Vivek Kumar M and Bharath Rajeswaran; Editing by Sherry Jacob-Phillips and Sonia Cheema)