I just received an email from the US Embassy in Jerusalem reading as follows:
The U.S. Embassy is closely monitoring the security situation as a result of rockets fired from Gaza across southern and central Israel, including Tel Aviv and Jerusalem, and the infiltration of Hamas militants. The U.S. Embassy is aware that there have been casualties as a result of these incidents. U.S. citizens are reminded to remain vigilant and take appropriate steps to increase their security awareness as security incidents, including mortar and rocket fire, often take place without warning.
U.S. Embassy personnel are currently sheltering in place. U.S. government personnel continue to be prohibited from travel to Gaza and areas within seven (7) miles of Gaza.