Israel has stepped up its spying activities along the border with Lebanon, fearing Hezbollah may have built an underground tunnel into the Jewish state, Lebanese security sources said Monday.

A senior security source told The Daily Star that Israel was increasingly worried that Hezbollah might have established a passage connecting south Lebanon to an unspecified area in Israel.

The recent discovery of two tunnels from the Hamas-run Gaza Strip into Israel has increased their fears, the source added. […]