Dioma could potentially be hit by Katusha's from the West Bank (about 19 miles distant), but is about 135 miles south of Lebanon. The farthest the currently known missiles from Hezbollah can go is about 35 miles.
"He said it was not an Iranian-made "Zilzal" rocket, which has a range of about 210 km (130 miles) and would have put the Israeli commercial capital Tel Aviv within reach." The 'he' is a police spokesman. This is from a Reuters article.
http://reuters.myway.com/article/20060728/2006-07-28T200930Z_01_L28814474_RTRIDST_0_NEWS-MIDEAST-ROCKETS-DC.html